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See detailEquivariant K-homology for hyperbolic reflection groups
Lafont, Jean-Francois; Ortiz, Ivonne; Rahm, Alexander UL et al

E-print/Working paper (in press)

We compute the equivariant K-homology of the classifying space for proper actions, for cocompact 3-dimensional hyperbolic reflection groups. This coincides with the topological K-theory of the reduced C ... [more ▼]

We compute the equivariant K-homology of the classifying space for proper actions, for cocompact 3-dimensional hyperbolic reflection groups. This coincides with the topological K-theory of the reduced C*-algebra associated to the group, via the Baum-Connes conjecture. We show that, for any such reflection group, the associated K-theory groups are torsion-free. This means that we can complete previous computations with rational coefficients to get results with integral coefficients. On the way, we establish an efficient criterion for checking torsion-freeness of K-theory groups, which can be applied far beyond the scope of the present paper. [less ▲]

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See detailEntwicklungen der Trans*-Bewegung in der Bundesrepublik Deutschland
De Silva, Adrian UL

E-print/Working paper (in press)

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See detailOn Farrell-Tate cohomology of SL_2 over S-integers
Rahm, Alexander UL; Wendt, Matthias

E-print/Working paper (in press)

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See detailLimit theorems for symmetric U-statistics using contractions
Döbler, Christian UL; Peccati, Giovanni UL

E-print/Working paper (2018)

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See detailBisymmetric and quasitrivial operations: characterizations and enumerations
Devillet, Jimmy UL

E-print/Working paper (2018)

We investigate the class of bisymmetric and quasitrivial binary operations on a given set X and provide various characterizations of this class as well as the subclass of bisymmetric, quasitrivial, and ... [more ▼]

We investigate the class of bisymmetric and quasitrivial binary operations on a given set X and provide various characterizations of this class as well as the subclass of bisymmetric, quasitrivial, and order-preserving binary operations. We also determine explicitly the sizes of these classes when the set X is finite. [less ▲]

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See detailGradient Estimates on Dirichlet and Neumann Eigenfunctions
Arnaudon, Marc; Thalmaier, Anton UL; Wang, Feng-Yu

E-print/Working paper (2018)

By methods of stochastic analysis on Riemannian manifolds, we derive explicit two-sided gradient estimates for Dirichlet eigenfunctions on a d-dimensional compact Riemannian manifold D with boundary ... [more ▼]

By methods of stochastic analysis on Riemannian manifolds, we derive explicit two-sided gradient estimates for Dirichlet eigenfunctions on a d-dimensional compact Riemannian manifold D with boundary. Corresponding two-sided gradient estimates for Neumann eigenfunctions are derived in the second part of the paper. [less ▲]

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See detailBrexit Seen from Luxembourg
Högenauer, Anna-Lena UL

E-print/Working paper (2018)

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See detailAlonso and the scaling of urban profiles
Delloye, Justin; Lemoy, Rémi UL; Caruso, Geoffrey UL

E-print/Working paper (2018)

Urban characteristics scaling with total population has become an important urban research field since one needs to better understand the benefits and disadvantages of urban growth and fur- ther ... [more ▼]

Urban characteristics scaling with total population has become an important urban research field since one needs to better understand the benefits and disadvantages of urban growth and fur- ther population concentration. Urban scaling research, however, is largely disconnected from the empirics and theory of intra-urban structure for it considers averaged attributes and ignores resi- dential choice trade-offs between transport and housing costs within cities. Using this fundamental trade-off, the monocentric model of Alonso provides theory to urban density profiles. However, it is silent about how these profiles scale with population, thus preventing empirical scaling studies to anchor in a strong micro-economic theory. This paper fixes this gap by introducing power laws for land and for population density in the Alonso model. From an augmented model with land use, we derive the conditions at which equilibrium profiles match recent empirical findings about the scaling of urban land and population density profiles in European cities. We find that the Alonso model is theoretically compatible with the observed scaling of population density profiles and leads to a satisfactory representation of European cities. The conditions for this compatibility refine current understanding of wage and transport costs elasticities with population. Although they require a scaling power of the profile of the share of urbanised land that is different from what is observed, it is argued that alternatives specifications of transport cost functions could solve this issue. Thus our results call for revisiting theories about land development and housing processes as well as the empirics of agglomeration benefits and transport costs. [less ▲]

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See detailDemographics and FDI: Lessons from China's One-Child Policy
Donaldson, John B.; Koulovatianos, Christos UL; Li, Jian et al

E-print/Working paper (2018)

Lucas (1990) argues that the neoclassical adjustment process fails to explain the relative paucity of FDI inflows from rich to poor countries. In this paper we consider a natural experiment: using China ... [more ▼]

Lucas (1990) argues that the neoclassical adjustment process fails to explain the relative paucity of FDI inflows from rich to poor countries. In this paper we consider a natural experiment: using China as the treated country and India as the control, we show that the dynamics of the relative FDI flows subsequent to the implementation of China's one-child policy, as seen in the data, are consistent with neoclassical fundamentals. In particular, following the introduction of the one-child policy in China, the capital-labor (K/L) ratio of China increased relative to that of India, and, simultaneously, relative FDI inflows into China vs. India declined. These observations are explained in the context of a simple neoclassical OLG paradigm. The adjustment mechanism works as follows: the reduction in the (urban) labor force due to the one-child policy increases the savings per capita. This increases the K/L ratio and reduces the marginal product of capital (MPK). The reduction in MPK (relative to India) reduces the relative attractiveness of investment in China and is thus associated with lower FDI/GDP ratios. Our paper contributes to the nascent literature exploring demographic transitions and their effects on FDI flows. [less ▲]

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See detailIsolation of nucleic acids from low biomass samples: detection and removal of sRNA contaminants
Heintz-Buschart, Anna; Yusuf, Dilmurat; Kaysen, Anne UL et al

E-print/Working paper (2017)

Sequencing-based analyses of low-biomass samples are known to be prone to misinterpretation due to the potential presence of contaminating molecules derived from laboratory reagents and environments. Due ... [more ▼]

Sequencing-based analyses of low-biomass samples are known to be prone to misinterpretation due to the potential presence of contaminating molecules derived from laboratory reagents and environments. Due to its inherent instability, contamination with RNA is usually considered to be unlikely. Here we report the presence of small RNA (sRNA) contaminants in widely used microRNA extraction kits and means for their depletion. Sequencing of sRNAs extracted from human plasma samples was performed and significant levels of non-human (exogenous) sequences were detected. The source of the most abundant of these sequences could be traced to the microRNA extraction columns by qPCR-based analysis of laboratory reagents. The presence of artefactual sequences originating from the confirmed contaminants were furthermore replicated in a range of published datasets. To avoid artefacts in future experiments, several protocols for the removal of the contaminants were elaborated, minimal amounts of starting material for artefact-free analyses were defined, and the reduction of contaminant levels for identification of bona fide sequences using 'ultra-clean' extraction kits was confirmed. In conclusion, this is the first report of the presence of RNA molecules as contaminants in laboratory reagents. The described protocols should be applied in the future to avoid confounding sRNA studies. [less ▲]

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See detailFundamental limits to helical edge conductivity due to sphin-phonon scattering
Groenendijk, Solofo UL; Dolcetto; Schmidt, Thomas UL

E-print/Working paper (2017)

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See detailUniversal scaling of quench-induced correlations in a one-dimensional channel at finite temperature
Calzona, Alessio UL; Gambetta, Filippo Maria; Carrega, Matteo et al

E-print/Working paper (2017)

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See detailInternetdelikte und die Herausforderungen des Forum Shoppings
Schmitz, Sandra UL

E-print/Working paper (2017)

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See detailMechanizing Principia Logico-Metaphysica in Functional Type Theory
Kirchner, Daniel; Benzmüller, Christoph UL; Zalta, Edward N.

E-print/Working paper (2017)

Principia Logico-Metaphysica proposes a foundational logical theory for metaphysics, mathematics, and the sciences. It contains a canonical development of Abstract Object Theory [AOT], a metaphysical ... [more ▼]

Principia Logico-Metaphysica proposes a foundational logical theory for metaphysics, mathematics, and the sciences. It contains a canonical development of Abstract Object Theory [AOT], a metaphysical theory (inspired by ideas of Ernst Mally, formalized by Zalta) that differentiates between ordinary and abstract objects. This article reports on recent work in which AOT has been successfully represented and partly automated in the proof assistant system Isabelle/HOL. [less ▲]

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See detailQuasitrivial semigroups: characterizations and enumerations
Couceiro, Miguel; Devillet, Jimmy UL; Marichal, Jean-Luc UL

E-print/Working paper (2017)

We investigate the class of quasitrivial semigroups and provide various characterizations of the subclass of quasitrivial and commutative semigroups as well as the subclass of quasitrivial and order ... [more ▼]

We investigate the class of quasitrivial semigroups and provide various characterizations of the subclass of quasitrivial and commutative semigroups as well as the subclass of quasitrivial and order-preserving semigroups. We also determine explicitly the sizes of these classes when the semigroups are defined on finite sets. As a byproduct of these enumerations, we obtain several new integer sequences. [less ▲]

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See detail3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs
Wolf, Claude UL

E-print/Working paper (2017)

3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs The future of 3D Printing or Additive Manufacturing [AM] will be driven by the next generation of engineers who are just ... [more ▼]

3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs The future of 3D Printing or Additive Manufacturing [AM] will be driven by the next generation of engineers who are just about to qualify, the Z generation (1994-2010). Do we, educators, know this Z generation? Do we know what motivates them? The Z generation is a generation of digital natives interacting with PCs, iPads, smartphones and the internet since birth, a pragmatic and short term orientated generation. Our prejudice brands them as unprepared and unmotivated, with their 10 second attention spans, but in reality, they have already proven they are creative, determined and hardworking as well as team oriented, when they are given the opportunity. They have understood that 3D printing offers them this opportunity. [less ▲]

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See detailScattering theory without injectivity radius assumptions and spectral stability for the Ricci flow
Güneysu, Batu; Thalmaier, Anton UL

E-print/Working paper (2017)

We prove a completely new integral criterion for the existence and completeness of the wave operators W_{\pm}(-\Delta_h,-\Delta_g, I_{g,h}) corresponding to the (unique self-adjoint realizations of) the ... [more ▼]

We prove a completely new integral criterion for the existence and completeness of the wave operators W_{\pm}(-\Delta_h,-\Delta_g, I_{g,h}) corresponding to the (unique self-adjoint realizations of) the Laplace-Beltrami operators -\Delta_j, j=g,h, that are induced by two quasi-isometric complete Riemannian metrics g and h on an open manifold M. In particular, this result provides a criterion for the absolutely continuous spectra of -\Delta_g and -\Delta_h to coincide. Our proof relies on estimates that are obtained using a probabilistic Bismut type formula for the gradient of a heat semigroup. Unlike all previous results, our integral criterion only requires some lower control on the Ricci curvatures and some upper control on the heat kernels, but no control at all on the injectivity radii. As a consequence, we obtain a stability result for the absolutely continuous spectrum under a Ricci flow. [less ▲]

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See detailTommaso Padoa-Schioppa [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration ... [more ▼]

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration of Europe. [less ▲]

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See detailDynamics of Income Rank Volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

E-print/Working paper (2017)

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions ... [more ▼]

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions, this paper proposes a framework that is based on individuals’ relative positions in the distribution, and is neutral in relation to structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals within both countries are the most volatile, the volatility trend for the middle class in each of these countries differs. [less ▲]

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See detailWeakly Inscribed Polyhedra
chen, hao; Schlenker, Jean-Marc UL

E-print/Working paper (2017)

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See detailIsogeometric analysis of thin Reissner-Mindlin plates and shells: Locking phenomena and generalized local B-bar method
Hu, Qingyuan UL; Xia, Yang; Natarajan, Sundararajan et al

E-print/Working paper (2017)

We propose a generalized local $\bar{B}$ framework, addressing locking in degenerated Reissner-Mindlin plate and shell formulations in the context of isogeometric analysis. Parasitic strain components are ... [more ▼]

We propose a generalized local $\bar{B}$ framework, addressing locking in degenerated Reissner-Mindlin plate and shell formulations in the context of isogeometric analysis. Parasitic strain components are projected onto the physical space locally, i.e. at the element level, using a least-squares approach. The formulation is general and allows the flexible utilization of basis functions of different order as the projection bases. The present formulation is much cheaper computationally than the global $\bar{B}$ method. Through numerical examples, we show the consistency of the scheme, although the method is not Hu-Washizu variationally consistent. The numerical examples show that the proposed formulation alleviates locking and yields good accuracy for various thicknesses, even for slenderness ratios of $1 \times 10^5$, and has the ability to capture deformations of thin shells using relatively coarse meshes. From the detailed numerical study, it can be opined that the proposed method is less sensitive to locking and mesh distortion. [less ▲]

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See detailDemocratic legitimacy [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent ... [more ▼]

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent (democratic legitimacy) and on other kinds of foundations (generic legitimacy). With reference to the European Union, debates have focused on empirical support for the EU, the nature of its "democratic deficit", and the potential conflict between European integration and national democratic sovereignty. [less ▲]

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See detailOn functional equations characterizing derivations: methods and examples
Gselmann, Eszter; Kiss, Gergely UL; Vincze, Csaba

E-print/Working paper (2017)

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See detailEvolution systems of measures and semigroup properties on evolving manifolds
Cheng, Li Juan UL; Thalmaier, Anton UL

E-print/Working paper (2017)

An evolving Riemannian manifold (M,g_t)_{t\in I} consists of a smooth d-dimensional manifold M, equipped with a geometric flow g_t of complete Riemannian metrics, parametrized by I=(-\infty,T). Given an ... [more ▼]

An evolving Riemannian manifold (M,g_t)_{t\in I} consists of a smooth d-dimensional manifold M, equipped with a geometric flow g_t of complete Riemannian metrics, parametrized by I=(-\infty,T). Given an additional C^{1,1} family of vector fields (Z_t)_{t\in I} on M. We study the family of operators L_t=\Delta_t +Z_t where \Delta_t denotes the Laplacian with respect to the metric g_t. We first give sufficient conditions, in terms of space-time Lyapunov functions, for non-explosion of the diffusion generated by L_t, and for existence of evolution systems of probability measures associated to it. Coupling methods are used to establish uniqueness of the evolution systems under suitable curvature conditions. Adopting such a unique system of probability measures as reference measures, we characterize supercontractivity, hypercontractivity and ultraboundedness of the corresponding time-inhomogeneous semigroup. To this end, gradient estimates and a family of (super-)logarithmic Sobolev inequalities are established. [less ▲]

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See detailReductions of points on algebraic groups
Lombardo, Davide; Perucca, Antonella UL

E-print/Working paper (2017)

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See detailNotes on the Schwarzian tensor and measured foliations at infinity of quasifuchsian manifolds.
Schlenker, Jean-Marc UL

E-print/Working paper (2017)

The boundary at infinity of a quasifuchsian hyperbolic manifold is equiped with a holomorphic quadratic differential. Its horizontal measured foliation $f$ can be interpreted as the natural analog of the ... [more ▼]

The boundary at infinity of a quasifuchsian hyperbolic manifold is equiped with a holomorphic quadratic differential. Its horizontal measured foliation $f$ can be interpreted as the natural analog of the measured bending lamination on the boundary of the convex core. This analogy leads to a number of questions. We provide a variation formula for the renormalized volume in terms of the extremal length $\ext(f)$ of $f$, and an upper bound on $\ext(f)$. \par We then describe two extensions of the holomorphic quadratic differential at infinity, both valid in higher dimensions. One is in terms of Poincar\'e-Einstein metrics, the other (specifically for conformally flat structures) of the second fundamental form of a hypersurface in a "constant curvature" space with a degenerate metric, interpreted as the space of horospheres in hyperbolic space. This clarifies a relation between linear Weingarten surfaces in hyperbolic manifolds and Monge-Amp\`ere equations. Notes aiming at clarifying the relations between different points of view and introducing one new notion, no real result. Not intended to be submitted at this point [less ▲]

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See detailArbeitsmotivation von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Die europäische Studie EWCS (Eurofund, 2016a, 2016b) zeigt auf, dass sich die Arbeitsmotivation der Arbeitnehmer in Luxemburg eher im mittleren Bereich wiederfindet. Die nationale Studie Quality of Work ... [more ▼]

Die europäische Studie EWCS (Eurofund, 2016a, 2016b) zeigt auf, dass sich die Arbeitsmotivation der Arbeitnehmer in Luxemburg eher im mittleren Bereich wiederfindet. Die nationale Studie Quality of Work Index belegt nur geringfügige Unterschiede der Arbeitsmotivation sowohl zwischen männlichen und weiblichen Arbeitnehmern als auch zwischen den verschiedenen Altersgruppen. Arbeitnehmer in einer Vorgesetztenposition, Manager und Führungskräfte zeigen im Durchschnitt eine höhere, Hilfsarbeitskräfte dagegen im Durchschnitt eine geringere Arbeitsmotivation. Überdurchschnittlich motiviert erweisen sich Arbeitnehmer in Nichtregierungsorganisationen (NGO). Die Arbeitsmotivation ist dabei mit verschiedenen psychosozialen Abeitsbedingungen sowie Arbeitsrahmenbedingungen korreliert. Parizipation an Entscheidungen, Feedback von Kollegen und Vorgesetzten, Kooperation unter Kollegen sowie Rollenklarheit sind positiv mit Arbeitsmotivation assoziert, das Erleben von Konkurrenz und Mobbing sind hingegen negativ assoziiert. Hinsichtlich Arbeitsrahmenbedingungen weist vor allem Arbeitsplatzsicherheit einen hohen Zusammenhang mit der Arbeitsmotivation auf, gefolgt von Einkommenszufriedenheit und Ausbildungsmöglichkeiten. [less ▲]

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See detailAssociative idempotent nondecreasing functions are reducible
Kiss, Gergely UL; Somlai, Gabor

E-print/Working paper (2017)

An n-variable associative function is called reducible if it can be written as a composition of a binary associative function. In this paper we summarize the known results when the function is defined on ... [more ▼]

An n-variable associative function is called reducible if it can be written as a composition of a binary associative function. In this paper we summarize the known results when the function is defined on a chain and nondecreasing. The main result of this paper shows that associative idempotent and nondecreasing functions are uniquely reducible. [less ▲]

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See detailHerman Van Rompuy [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Herman Van Rompuy (b. 1947) is a Belgian and European politician. In his capacity as President of the European Council (2009-2014), he played a key role in the EU's response to the financial crisis and in ... [more ▼]

Herman Van Rompuy (b. 1947) is a Belgian and European politician. In his capacity as President of the European Council (2009-2014), he played a key role in the EU's response to the financial crisis and in the strengthening of the European framework of economic governance. [less ▲]

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See detailWolfgang Schäuble [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Wolfgang Schäuble (b. 1942) is an active German politician. He played a key role in the German reunification process (1989-90) and in the management of the Eurozone crisis (since 2009).

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See detailSolidarity [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The principle of solidarity plays a key role in discussions of social, economic, and political issues. A polysemic notion, it may interrogate either individuals or public authorities. It often represents ... [more ▼]

The principle of solidarity plays a key role in discussions of social, economic, and political issues. A polysemic notion, it may interrogate either individuals or public authorities. It often represents the counterpart of competition in the analysis and assessment of social norms and public policies. [less ▲]

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See detailLocalisation résidentielle de la population étrangère selon la nationalité et la structure urbaine au Luxembourg
Pigeron-Piroth, Isabelle UL; Heinz, Andreas UL; Caruso, Geoffrey UL

E-print/Working paper (2017)

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the ... [more ▼]

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the different nationalities living in Luxembourg. It seeks to underline differences through indicators built from the 2011 census data. We focus on the territorial distribution of the different nationalities by taking into account the urban structure and distance to jobs. If differences according to nationalities in the residential behavior of households can be empirically identified they may raise issues of spatial equity and (un)equal accessibility to job market. We analyse whether the geographic location of different nationalities in Luxembourg is linked to urbanisation level, the distance to the “poles d´emploi” or general accessibility to jobs. [less ▲]

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See detailThe European Commission’s "Reflection Paper on Harnessing Globalisation"
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The new EC reflection paper on globalisation sets new accents, but contains no major departure from current policy orientations. It takes a clear stand for free trade, while attacking "unfair competition ... [more ▼]

The new EC reflection paper on globalisation sets new accents, but contains no major departure from current policy orientations. It takes a clear stand for free trade, while attacking "unfair competition" and arguing for a "balanced, rules-based and progressive trade and investment agenda". Despite its insistence on a managed globalisation and a fair redistribution of its benefits, its proposals are unlikely to allay domestic anxieties and external criticism. [less ▲]

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See detailCross-border mergers and acquisitions: Evidence from Indochina
Wolff, Christian UL

E-print/Working paper (2017)

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See detailLa restructuration des dettes publiques saisie par le droit de l'Union européenne
Allemand, Frederic UL

E-print/Working paper (2017)

En juillet 2015, le sommet de la zone euro fait part de l'existence de "sérieux doutes" sur le caractère soutenable de la dette grecque. La possibilité d'un reprofilage de la dette est envisagé et sa ... [more ▼]

En juillet 2015, le sommet de la zone euro fait part de l'existence de "sérieux doutes" sur le caractère soutenable de la dette grecque. La possibilité d'un reprofilage de la dette est envisagé et sa discussion reportée à la réalisation de la première évaluation des mesures d'ajustement mises en oeuvre par la Grèce. Toute décote nominale est cependant formellement exclue, car contraire au droit de l'Union. Les discussions se sont ouvertes au printemps 2016 sur les modalités d'allègement de la dette publique de la Grèce. Le sujet a été au coeur de la réunion de l'Eurogroupe du 22 mai. Aucun accord n'a été trouvé, mais les discussions continuent. Dans ce contexte, Frédéric Allemand a présenté le 17 mai dernier une communication sur la saisine des opérations de restructuration par le droit de l'Union lors du séminaire de recherche pluridisciplinaire "Les administrations publiques à l'épreuve de leur dette" organisé par Jean-François Boudet (Université Paris II) et Caroline Lequesne-Roth (Université de Nice). L'auteur conclut à la compétence de l'Union pour encadrer la restructuration des dettes publiques des États membres. [less ▲]

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See detailUnderstanding audit oversight transformation : ramifications of institutional work and the power of (de-)mythologizing
Löhlein, Lukas; Muessig, Anke UL

E-print/Working paper (2017)

This study investigates the dynamics that transformed audit oversight in Germany from an instrument, organized by the profession, to maintain international legitimacy into a regulatory regime that is ... [more ▼]

This study investigates the dynamics that transformed audit oversight in Germany from an instrument, organized by the profession, to maintain international legitimacy into a regulatory regime that is integrated into the state apparatus. While prior research has focused on countries where the global demand for oversight structures overlapped with local pressures for regulatory reforms, we examine the diffusion of patterns of control within a context that is characterized by a strong mythologized belief in the German qualified statutory auditor and professional self-regulation. By analysing archival documents and interviews with key actors, we investigate through the lens of institutional work how initially the audit establishment maintained the existing self-regulatory logic despite, and because of, the implementation of formal independent oversight structures. We illustrate how the institutional work of small auditors aimed at disrupting the large audit firms’ field dominance unintentionally undermined the mythologized self-regulation. In doing so, we offer insights into how institutional myth is both constructed and dismantled. Our focus on multiple actors allows us to shed light on how parallel institutional work of distinct actors can lead to mutually effective and unintended institutional consequences. We argue that a successful institutional worker executes a combination of two basic types of work, which we refer to as existential and instrumental modes of work. Finally, comparing our findings with literature on audit oversight in other countries allows us to conceptualize audit oversight along a political-operational dimension and a public-private dimension. [less ▲]

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See detailGesundheitsverhalten von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Insbesonders unter den jüngeren Arbeitnehmern und unter den Arbeitnehmern mit geringer Bildung ist der Anteil der Raucher vergleichsweise hoch. Männliche und ältere Arbeitnehmer weisen wieder einen ... [more ▼]

Insbesonders unter den jüngeren Arbeitnehmern und unter den Arbeitnehmern mit geringer Bildung ist der Anteil der Raucher vergleichsweise hoch. Männliche und ältere Arbeitnehmer weisen wieder einen vergleichsweise hohen Alkoholkonsum auf. Differenziert nach Berufsgruppen zeigen vor allem Arbeitnehmer in Handwerksberufen sowie Manager und Führungskräfte einen hohen Alkoholkonsum. Die Arbeitnehmer in der jüngsten Altersgruppe (16 bis 24 Jährige) schlafen durchschnittlich etwas länger, im Vergleich zu den älteren Arbeitnehmern. Außerdem ist die Sporthäufigkeit in der jüngsten Altersgruppe am höchsten. Männliche Arbeitnehmer sowie Arbeitnehmer ohne Partner oder ohne Kinder treiben ebenfalls überduchschnittlich häufig Sport. Etwa 17% der Arbeitnehmer leidet unter Adipositas. Knapp 30% der Arbeitnehmer leidet manchmal oder häufiger an gesundheitlichen Problemen. Unter den gesundheitlichen Problemen sind Rückenprobleme besonders häufig, gefolgt von Schlafschwierigkeiten und Kopfschmerzen. Herzprobleme sind dagegen eher selten ausgeprägt. Arbeitnehmer mit Hochschulabschluss sowie Manager und Führungskräfte sind seltener von Gesundheitsproblemen betroffen. Gesundheitliche Probleme sind insgesamt mit Zigarettenkonsum, Schlafstunden pro Tag, Sporthäufigkeit und Body Mass Index assoziiert: Je weniger geraucht wird, je mehr geschlafen und Sport getrieben wird und je geringer das körperliche Gewicht der Arbeitnehmer, desto weniger Gesundheitsprobleme liegen tendenziell vor. [less ▲]

Detailed reference viewed: 36 (3 UL)
See detailThe economic programme of Emmanuel Macron
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The outsider Emmanuel Macron is the winner of the first round of the French presidential election. His economic programme is betting on a strategy of fiscal consolidation, tax cuts, targeted investments ... [more ▼]

The outsider Emmanuel Macron is the winner of the first round of the French presidential election. His economic programme is betting on a strategy of fiscal consolidation, tax cuts, targeted investments, and further Europeanisation. Success crucially hinges on the outcome of the June legislative elections and on a favourable evolution of the global economic environment. [less ▲]

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See detailCharacterizations of quasitrivial symmetric nondecreasing associative operations
Devillet, Jimmy UL; Kiss, Gergely UL; Marichal, Jean-Luc UL

E-print/Working paper (2017)

In this paper we are interested in the class of n-ary operations on an arbitrary chain that are quasitrivial, symmetric, nondecreasing, and associative. We first provide a description of these operations ... [more ▼]

In this paper we are interested in the class of n-ary operations on an arbitrary chain that are quasitrivial, symmetric, nondecreasing, and associative. We first provide a description of these operations. We then prove that associativity can be replaced with bisymmetry in the definition of this class. Finally we investigate the special situation where the chain is finite. [less ▲]

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See detailHyperbolic ends with particles and grafting on singular surfaces
chen, qiyu; Schlenker, Jean-Marc UL

E-print/Working paper (2017)

We prove that any hyperbolic end with particles (cone singularities along infinite curves of angles less than π) admits a unique foliation by constant Gauss curvature surfaces. Using a form of duality ... [more ▼]

We prove that any hyperbolic end with particles (cone singularities along infinite curves of angles less than π) admits a unique foliation by constant Gauss curvature surfaces. Using a form of duality between hyperbolic ends with particles and convex globally hyperbolic maximal (GHM) de Sitter spacetime with particles, it follows that any convex GHM de Sitter spacetime with particles also admits a unique foliation by constant Gauss curvature surfaces. We prove that the grafting map from the product of Teichm\"uller space with the space of measured laminations to the space of complex projective structures is a homeomorphism for surfaces with cone singularities of angles less than π, as well as an analogue when grafting is replaced by "smooth grafting". [less ▲]

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See detailScaling evidence of the homothetic nature of cities
Lemoy, Rémi UL; Caruso, Geoffrey UL

E-print/Working paper (2017)

In this paper we analyse the profile of land use and population density with respect to the distance to the city centre for the European city. In addition to providing the radial population density and ... [more ▼]

In this paper we analyse the profile of land use and population density with respect to the distance to the city centre for the European city. In addition to providing the radial population density and soil-sealing profiles for a large set of cities, we demonstrate a remarkable constancy of the profiles across city size. Our analysis combines the GMES/Copernicus Urban Atlas 2006 land use database at 5m resolu- tion for 300 European cities with more than 100.000 inhabitants and the Geostat population grid at 1km resolution. Population is allocated proportionally to surface and weighted by soil sealing and density classes of the Urban Atlas. We analyse the profile of each artificial land use and population with distance to the town hall. In line with earlier literature, we confirm the strong monocentricity of the European city and the negative exponential curve for population density. Moreover, we find that land use curves, in particular the share of housing and roads, scale along the two horizontal dimensions with the square root of city population, while population curves scale in three dimensions with the cubic root of city population. In short, European cities of different sizes are homothetic in terms of land use and population density. While earlier literature documented the scaling of average densities (total surface and population) with city size, we document the scaling of the whole radial distance profile with city size, thus liaising intra-urban radial analysis and systems of cities. In addition to providing a new empirical view of the European city, our scaling offers a set of practical and coherent definitions of a city, independent of its population, from which we can re-question urban scaling laws and Zipf’s law for cities. [less ▲]

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See detailBenelux, Europe and the Cold War, the power of non-powers
Paravantis, Spero UL

E-print/Working paper (2017)

The conference “Benelux, Europe and the Cold War, the power of non-powers”, which took place on 30 and 31 March 2017 at the University of Luxembourg, was the first of three events planned in the FNR ... [more ▼]

The conference “Benelux, Europe and the Cold War, the power of non-powers”, which took place on 30 and 31 March 2017 at the University of Luxembourg, was the first of three events planned in the FNR-funded CORE junior project “Benelux”, as part of its public outreach and academic output objectives. The conference sought to highlight asymmetrical power relations in the Cold War period of European integration by examining European security. What was/is European security in the context of the Cold War? How was and is it conceived? What role did “non-powers” play in European security, and how did they help define it? This conference investigated these and other related questions by re-examining the US/European relationship in the early Cold War and the role that developments during this period played in the European integration movement. In so doing, the conference also showcased findings which helped unify historiographies of the Cold War and European integration. [less ▲]

Detailed reference viewed: 28 (5 UL)
See detailUniversal Reasoning, Rational Argumentation and Human-Machine Interaction
Benzmüller, Christoph UL

E-print/Working paper (2017)

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning ... [more ▼]

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning approach. Universal logic reasoning in turn, as envisioned already by Leibniz, may support the rigorous formalisation and deep logical analysis of rational arguments within machines. A respective universal logic reasoning framework is described and a range of exemplary applications are discussed. In the future, universal logic reasoning in combination with appropriate, controlled forms of rational argumentation may serve as a communication layer between humans and intelligent machines. [less ▲]

Detailed reference viewed: 8 (2 UL)
See detailPopulation ageing [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Population ageing is a major trend in contemporary European societies. A consequence of welcome shifts in life expectancy and fertility, it nevertheless entails important challenges for the adequacy ... [more ▼]

Population ageing is a major trend in contemporary European societies. A consequence of welcome shifts in life expectancy and fertility, it nevertheless entails important challenges for the adequacy, sustainability, and competitiveness of social and economic systems. [less ▲]

Detailed reference viewed: 13 (1 UL)
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See detailSudoses et inégalités sociales
Origer, Alain; Baumann, Michèle UL

E-print/Working paper (2017)

Des chercheurs du Ministère de la Santé (Dr. Alain ORIGER) et de l’unité de recherche INSIDE, Institut Santé & Comportement (Pr. Michèle BAUMANN et son équipe) ont publié récemment dans la revue ... [more ▼]

Des chercheurs du Ministère de la Santé (Dr. Alain ORIGER) et de l’unité de recherche INSIDE, Institut Santé & Comportement (Pr. Michèle BAUMANN et son équipe) ont publié récemment dans la revue scientifique PLoS ONE un article intitulé : A social gradient in fatal opioids and cocaine related overdoses ? Sélectionné par un jury d’experts internationaux, cet article a été primé au Scientific Award 2016 dans le cadre de l’European Monitoring Centre for Drugs and Drug Addiction.h ttps://insideblog.uni.lu/surdoses-et-inegalites-sociales/ [less ▲]

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See detailHow do inventor networks affect urban invention?
Berge, Laurent UL; Carayol, Nicolas; Roux, Pascale

E-print/Working paper (2017)

Social networks are expected to matter for invention in cities, but empirical evidence is still puzzling. In this paper, we provide new results on urban patenting covering more than twenty years of ... [more ▼]

Social networks are expected to matter for invention in cities, but empirical evidence is still puzzling. In this paper, we provide new results on urban patenting covering more than twenty years of European patents invented by nearly one hundred thousand inventors located in France. Elaborating on the recent economic literatures on peer effects and on games in social networks, we assume that the productivity of an inventor’s efforts is positively affected by the efforts of his or her partners and negatively by the number of these partners’ connections. In this framework, inventors’ equilibrium outcomes are proportional to the square of their network centrality, which encompasses, as special cases, several well-known forms of centrality (Degree, Katz-Bonacich, Page-Rank). Our empirical results show that urban inventors benefit from their collaboration network. Their production increases when they collaborate with more central agents and when they have more collaborations. Our estimations suggest that inventors’ productivity grows sublinearly with the efforts of direct partners, and that they incur no negative externality from them having many partners. Overall, we estimate that a one standard deviation increase in local inventors’ centrality raises future urban patenting by 13%. [less ▲]

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See detailTempered subanalytic topology on algebraic varieties
Petit, François UL

E-print/Working paper (2017)

On a smooth complex algebraic variety, we build the tempered subanalytic and Stein tempered subanalytic sites. We construct the sheaf of holomorphic functions tempered at infinity over these sites and ... [more ▼]

On a smooth complex algebraic variety, we build the tempered subanalytic and Stein tempered subanalytic sites. We construct the sheaf of holomorphic functions tempered at infinity over these sites and study their relations with the sheaf of regular functions, proving in particular that these sheaves are isomorphic on Zariski open subsets. We show that these data allow to define the functors of tempered and Stein tempered analytifications. We study the relations between these two functors and the usual analytification functor. We also obtain algebraization results in the non-proper case and flatness results. [less ▲]

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Peer Reviewed
See detailThe maximum number of systoles for genus two Riemann surfaces with abelian differentials
Judge, Chris; Parlier, Hugo UL

E-print/Working paper (2017)

This article explores the length and number of systoles associated to holomorphic $1$-forms on surfaces. In particular, we show that up to homotopy, there are at most $10$ systolic loops on such a genus ... [more ▼]

This article explores the length and number of systoles associated to holomorphic $1$-forms on surfaces. In particular, we show that up to homotopy, there are at most $10$ systolic loops on such a genus two surface and that the bound is realized by a unique translation surface up to homothety. We also provide sharp upper bounds on the the number of homotopy classes of systoles for a holomorphic $1$-form with a single zero in terms of the genus. [less ▲]

Detailed reference viewed: 34 (3 UL)
See detailImages of Galois representations in mod p Hecke algebras
Amoros Carafi, Laia UL

E-print/Working paper (2017)

Detailed reference viewed: 26 (2 UL)
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See detailC’était extrêmement violent» Il y a 100 ans, la révolution de Février a provoqué la fin de l’Empire russe
Paravantis, Spero UL

E-print/Working paper (2017)

La révolution de Février, qui s'est déroulée du 8 mars (23 février) 1917 au 13 mars (28 février) 1917, marque le début de la révolution russe de 1917. Elle force l'abdication du tsar Nicolas II et ... [more ▼]

La révolution de Février, qui s'est déroulée du 8 mars (23 février) 1917 au 13 mars (28 février) 1917, marque le début de la révolution russe de 1917. Elle force l'abdication du tsar Nicolas II et provoque la fin de l'Empire russe. Un gouvernement provisoire dirige, mais la même année, la révolution d'Octobre met au pouvoir des bolcheviks et permet la création de l'Union des républiques socialistes soviétiques (URSS). Le chercheur au «Centre for Contemporary and Digital History» à l’Université du Luxembourg, Dr. Spero S.Z. Paravantis nous détaille ce chapitre de l’histoire. [less ▲]

Detailed reference viewed: 28 (8 UL)
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See detailWohlbefinden von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Vergleicht man die Teilnehmer der Quality of Work Index Luxembourg Umfrage mit anderen europäischen Arbeitnehmern, zeigen die Teilnehmer aus Luxemburg im Durchschnitt ein geringeres Wohlbefinden ... [more ▼]

Vergleicht man die Teilnehmer der Quality of Work Index Luxembourg Umfrage mit anderen europäischen Arbeitnehmern, zeigen die Teilnehmer aus Luxemburg im Durchschnitt ein geringeres Wohlbefinden. Insbesondere jüngere Arbeitnehmer weisen ein tendenziell geringeres Wohlbefinden auf. Differenziert man die Arbeitnehmer nach Berufsgruppen, zeigen Manager und Führungskräfte, Arbeitnehmer in Dienstleistungsberufen sowie Hilfsarbeitskräfte das höchste Wohlbefinden. Arbeitnehmer mit geringeren faktischen Wochenstundenzahlen sowie Arbeitnehmer, die in kleinen Betrieben (1-4 Beschäftigte) arbeiten, berichten über ein höheres Wohlbefinden. Das Wohlbefinden ist hierbei nachweislich mit unterschiedlichen Arbeitsbedingungen assoziiert. So weisen Arbeitnehmer, je höher ihre Partizipation, ihre Rollenklarheit bei der Arbeit sowie ihre Arbeitsplatzsicherheit ist umso ein höheres Wohlbefinden auf. Das Wohlbefinden ist außerdem positiv mit Arbeitszufriedenheit, wahrgenommenem Respekt bei der Arbeit und negativ mit Stress und Burnout korreliert. [less ▲]

Detailed reference viewed: 46 (10 UL)
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See detailHow did the ECB become a fully-fledged central bank of the eurozone?
Gren, Jakub UL

E-print/Working paper (2017)

Detailed reference viewed: 68 (4 UL)
See detailEvaluating How Child Allowances and Daycare Subsidies Affect Fertility
Goldstein, Joshua R.; Koulovatianos, Christos UL; Li, Jian UL et al

E-print/Working paper (2017)

We compare the cost effectiveness of two pronatalist policies: (a) child allowances; and (b) daycare subsidies. We pay special attention to estimating how intended fertility (fertility before children are ... [more ▼]

We compare the cost effectiveness of two pronatalist policies: (a) child allowances; and (b) daycare subsidies. We pay special attention to estimating how intended fertility (fertility before children are born) responds to these policies. We use two evaluation tools: (i) a dynamic model on fertility, labor supply, outsourced childcare time, parental time, asset accumulation and consumption; and (ii) randomized vignette-survey policy experiments. We implement both tools in the United States and Germany, finding consistent evidence that daycare subsidies are more cost effective. Nevertheless, the required public expenditure to increase fertility to the replacement level might be viewed as prohibitively high. [less ▲]

Detailed reference viewed: 36 (5 UL)
See detailPopulism [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

A chameleonic concept, populism can be defined as an ideology, a communication style, a political strategy, or a misguided category. Its key elements are a positive appreciation of people, a negative view ... [more ▼]

A chameleonic concept, populism can be defined as an ideology, a communication style, a political strategy, or a misguided category. Its key elements are a positive appreciation of people, a negative view of the elite, and the exaltation of untrammeled popular sovereignty against representative democracy and liberal constitutionalism. The fortune of the term, despite its theoretical and practical drawbacks, is the reflection of intrinsic antinomies of modern democracy and of a growing popular dissatisfaction toward the performance of representative governments and institutions. [less ▲]

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See detailBayesian inference for the stochastic identification of elastoplastic material parameters: Introduction, misconceptions and insights
Rappel, Hussein UL; Beex, Lars UL; Hale, Jack UL et al

E-print/Working paper (2017)

We discuss Bayesian inference (BI) for the probabilistic identification of material parameters. This contribution aims to shed light on the use of BI for the identification of elastoplastic material ... [more ▼]

We discuss Bayesian inference (BI) for the probabilistic identification of material parameters. This contribution aims to shed light on the use of BI for the identification of elastoplastic material parameters. For this purpose a single spring is considered, for which the stress-strain curves are artificially created. Besides offering a didactic introduction to BI, this paper proposes an approach to incorporate statistical errors both in the measured stresses, and in the measured strains. It is assumed that the uncertainty is only due to measurement errors and the material is homogeneous. Furthermore, a number of possible misconceptions on BI are highlighted based on the purely elastic case. [less ▲]

Detailed reference viewed: 244 (83 UL)
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See detailInstitutional Determinants of Early Job Insecurity in Nine European Countries: Country Report Switzerland
Imdorf, Christian; Shi, Lulu P.; Helbling, Laura et al

E-print/Working paper (2017)

An overview of institutional determinants of early job insecurity in Switzerland.

Detailed reference viewed: 14 (5 UL)
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Peer Reviewed
See detailChromatic numbers for the hyperbolic plane and discrete analogs
Parlier, Hugo UL; Petit, Camille

E-print/Working paper (2017)

We study colorings of the hyperbolic plane, analogously to the Hadwiger-Nelson problem for the Euclidean plane. The idea is to color points using the minimum number of colors such that no two points at ... [more ▼]

We study colorings of the hyperbolic plane, analogously to the Hadwiger-Nelson problem for the Euclidean plane. The idea is to color points using the minimum number of colors such that no two points at distance exactly $d$ are of the same color. The problem depends on $d$ and, following a strategy of Kloeckner, we show linear upper bounds on the necessary number of colors. In parallel, we study the same problem on $q$-regular trees and show analogous results. For both settings, we also consider a variant which consists in replacing $d$ with an interval of distances. [less ▲]

Detailed reference viewed: 22 (1 UL)
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Peer Reviewed
See detailA Peccati-Tudor type theorem for Rademacher chaoses
Zheng, Guangqu UL

E-print/Working paper (2017)

In this article, we prove that in the Rademacher setting, a random vector with chaotic components is close in distribution to a centred Gaussian vector, if both the maximal influence of the associated ... [more ▼]

In this article, we prove that in the Rademacher setting, a random vector with chaotic components is close in distribution to a centred Gaussian vector, if both the maximal influence of the associated kernel and the fourth cumulant of each component is small. In particular, we recover the univariate case recently established in D\"obler and Krokowski (2017). Our main strategy consists in a novel adaption of the exchangeable pairs couplings initiated in Nourdin and Zheng (2017), as well as its combination with estimates via chaos decomposition. [less ▲]

Detailed reference viewed: 23 (5 UL)
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See detailDerivative and divergence formulae for diffusion semigroups
Thalmaier, Anton UL; Thompson, James UL

E-print/Working paper (2017)

Detailed reference viewed: 152 (35 UL)
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See detailConformal actions of real-rank 1 simple Lie groups on pseudo-Riemannian manifolds
Pecastaing, Vincent UL

E-print/Working paper (2017)

Given a simple Lie group G of rank 1, we consider compact pseudo-Riemannian manifolds (M,g) of signature (p,q) on which G can act conformally. Precisely, we determine the smallest possible value for the ... [more ▼]

Given a simple Lie group G of rank 1, we consider compact pseudo-Riemannian manifolds (M,g) of signature (p,q) on which G can act conformally. Precisely, we determine the smallest possible value for the index min(p,q) of the metric. When the index is optimal and G non-exceptional, we prove that the metric must be conformally flat, confirming the idea that in a "good" dynamical context, a geometry is determined by its automorphisms group. This completes anterior investigations on pseudo-Riemannian conformal actions of semi-simple Lie groups of maximal real-rank. Combined with these results, we obtain as corollary the list of semi-simple Lie groups without compact factor that can act on compact Lorentzian manifolds. We also derive consequences in CR geometry via the Fefferman fibration. [less ▲]

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See detailTechnological progress, the supply of hours worked, and the consumption-leisure complementarity
Irmen, Andreas UL

E-print/Working paper (2017)

At least since 1870 hours worked per worker declined and real wages increased in many of today’s industrialized countries. The dual nature of technological progress in conjunction with a consumption ... [more ▼]

At least since 1870 hours worked per worker declined and real wages increased in many of today’s industrialized countries. The dual nature of technological progress in conjunction with a consumption-leisure complementarity explains these stylized facts. Technological progress drives real wages up and expands the amount of available con- sumption goods. Enjoying consumption goods increases the value of leisure. Therefore, individuals demand more leisure and supply less labor. This mechanism appears in an OLG-model with two-period lived individuals equipped with per-period utility func- tions of the generalized log-log type proposed by Boppart-Krusell (2016). The optimal plan is piecewise defined and hinges on the wage level. Technological progress moves a poor economy out of a regime with low wages and an inelastic supply of hours worked into a regime where wages increase further and hours worked continuously decline. [less ▲]

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See detailExplaining employers’ hiring decisions: A comparative study of employers’ risk assessment
Imdorf, Christian; Shi, Lulu P.; Sacchi, Stefan et al

E-print/Working paper (2017)

In order to investigate the scarring effect of early job insecurity on future employment chances we have implemented a factorial survey experiment with recruiters based on real vacancies in Bulgaria ... [more ▼]

In order to investigate the scarring effect of early job insecurity on future employment chances we have implemented a factorial survey experiment with recruiters based on real vacancies in Bulgaria, Greece, Norway and Switzerland. We contribute to recruitment research at least in three ways: First, the multinational design allows us to run comparative analysis across countries, which are carried out along the national dimensions youth unemployment rate, employment protection regulation and type of educational system. Second, we differentiate between two different forms of early job insecurity – unemployment and work experience in deskilling jobs, and we demonstrate that the sole focus on unemployment, as it is the case in the prevalent labour market research, is not sufficient in order to fully understand labour market outcomes caused by different forms of job insecurities. Third, since our sample consists of real recruiters who were hiring for current jobs at the time when the study was carried out, we provide a unique cross-country data set of high external validity. Our findings suggest that scarring effects of early job insecurity vary across countries and across occupational fields, and while scarring caused by work experience in deskilling jobs seems to be enforced by strong employment protection regulations, unemployment scarring seems to stronger where national unemployment is low. Further, the differences in recruiter’s evaluation across occupational fields indicate that signalling value of education may vary depending on specific sectors. Not at least, we contribute to debates around active labour market policies, arguing that measures aiming at quick labour market reintegration without consideration of job quality may not be the most sustainable solution, as work experience in a deskilling job does not lead to better recruiter’s evaluation. [less ▲]

Detailed reference viewed: 90 (3 UL)
Peer Reviewed
See detailNodal Statistics of Planar Random Waves
Nourdin, Ivan UL; Peccati, Giovanni UL; Rossi, Maurizia UL

E-print/Working paper (2017)

Detailed reference viewed: 24 (0 UL)
See detailMultilingualism as Migration. Remarks on Literature, Philology, and Culture
Dembeck, Till UL

E-print/Working paper (2017)

Detailed reference viewed: 5 (0 UL)
See detailFourth moment theorems on The Poisson space in any dimension
Döbler, Christian UL; Vidotto, Anna UL; Zheng, Guangqu UL

E-print/Working paper (2017)

Detailed reference viewed: 60 (6 UL)
Peer Reviewed
See detailExchangeable pairs on Wiener chaos
Nourdin, Ivan UL; Zheng, Guangqu UL

E-print/Working paper (2017)

Detailed reference viewed: 23 (2 UL)
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See detailAsymptotic distribution of nodal intersections for arithmetic random waves
Rossi, Maurizia UL; Wigman, Igor

E-print/Working paper (2017)

Detailed reference viewed: 22 (0 UL)
See detailHochbegabte: eine besondere Minderheit?
Baudson, Tanja UL

E-print/Working paper (2017)

Detailed reference viewed: 12 (1 UL)
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See detailIntegrated likelihood based inference for nonlinear panel data models with unobserved effects
Schumann, Martin UL; Severini, Thomas A.; Tripathi, Gautam UL

E-print/Working paper (2017)

Detailed reference viewed: 55 (5 UL)
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See detailMonotonicity of probit weights
Schumann, Martin; Tripathi, Gautam UL

E-print/Working paper (2017)

Detailed reference viewed: 32 (1 UL)
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See detailIdentifying individual rights in EU law
Hofmann, Herwig UL; Warin, Catherine UL

E-print/Working paper (2017)

Detailed reference viewed: 62 (5 UL)
See detailRecurrence and Transience of Frogs with Drift on Z^d
Döbler, Christian UL; Gantert, Nina; Höfelsauer, Thomas et al

E-print/Working paper (2017)

Detailed reference viewed: 23 (1 UL)
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See detailEulerian idempotent, pre-Lie logarithm and combinatorics of trees
Bandiera, Ruggero; Schätz, Florian UL

E-print/Working paper (2017)

The aim of this paper is to bring together the three objects in the title. Recall that, given a Lie algebra g, the Eulerian idempotent is a canonical projection from the enveloping algebra U(g) to g. The ... [more ▼]

The aim of this paper is to bring together the three objects in the title. Recall that, given a Lie algebra g, the Eulerian idempotent is a canonical projection from the enveloping algebra U(g) to g. The Baker-Campbell-Hausdorff product and the Magnus expansion can both be expressed in terms of the Eulerian idempotent, which makes it interesting to establish explicit formulas for the latter. We show how to reduce the computation of the Eulerian idempotent to the computation of a logarithm in a certain pre-Lie algebra of planar, binary, rooted trees. The problem of finding formulas for the pre-Lie logarithm, which is interesting in its own right – being related to operad theory, numerical analysis and renormalization – is addressed using techniques inspired by umbral calculus. As a consequence of our analysis, we find formulas both for the Eulerian idempotent and the pre-Lie logarithm in terms of the combinatorics of trees. [less ▲]

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See detailGrenzüberschreitende Alltagspraktiken in der Großregion SaarLorLux
Wille, Christian UL; Pauly, Michel UL; Caruso, Geoffrey UL et al

E-print/Working paper (2017)

This paper examines everyday practices carried out by the inhabitants of Saarland, Lorraine, Luxembourg, Rhineland-Palatinate and Wallonia in neighbouring regions abroad. The key consideration here is ... [more ▼]

This paper examines everyday practices carried out by the inhabitants of Saarland, Lorraine, Luxembourg, Rhineland-Palatinate and Wallonia in neighbouring regions abroad. The key consideration here is that the Greater Region SaarLorLux can be defined as a cross-border reality of life based on the cross-border implementation of everyday practices of its inhabitants. In such a socio-constructivist perspective, it is not asked what the Greater Region SaarLorLux is, but in what ways it is constituted or how it manifests itself in the everyday life of its inhabitants. [less ▲]

Detailed reference viewed: 35 (4 UL)
Peer Reviewed
See detailFreeness characterisations on free chaos spaces
Bourguin, Solesne UL; Nourdin, Ivan UL

E-print/Working paper (2017)

Detailed reference viewed: 29 (1 UL)
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See detailQuantitative C1-estimates by Bismut formulae
Cheng, Li Juan UL; Thalmaier, Anton UL; Thompson, James UL

E-print/Working paper (2017)

For a C2 function u and an elliptic operator L, we prove a quantitative estimate for the derivative du in terms of local bounds on u and Lu. An integral version of this estimate is then used to derive a ... [more ▼]

For a C2 function u and an elliptic operator L, we prove a quantitative estimate for the derivative du in terms of local bounds on u and Lu. An integral version of this estimate is then used to derive a condition for the zero-mean value property of Δu. An extension to differential forms is also given. Our approach is probabilistic and could easily be adapted to other settings. [less ▲]

Detailed reference viewed: 124 (32 UL)
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See detailEntropy degeneration of globally hyperbolic maximal compact anti-de Sitter structures
Tamburelli, Andrea UL

E-print/Working paper (2017)

Using the parameterisation of the deformation space of GHMC anti-de Sitter structures on S×ℝ by the cotangent bundle of the Teichmüller space of S, we study how some geometric quantities, such as the ... [more ▼]

Using the parameterisation of the deformation space of GHMC anti-de Sitter structures on S×ℝ by the cotangent bundle of the Teichmüller space of S, we study how some geometric quantities, such as the Lorentzian Hausdorff dimension of the limit set, the width of the convex core and the Hölder exponent, degenerate along rays of quadratic differentials. [less ▲]

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See detailOn the fourth moment condition for Rademacher chaos
Döbler, Christian UL; Krokowski, Kai

E-print/Working paper (2017)

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See detailTimes of Crisis, Times of Prospects: Can the EU Learn from the 1970s?
Herzog, Mechthild UL

E-print/Working paper (2017)

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See detailConstant mean curvature foliation of globally hyperbolic (2+1)-spacetime with particles
Chen, Qiyu; Tamburelli, Andrea UL

E-print/Working paper (2017)

Let M be a globally hyperbolic maximal compact 3-dimensional spacetime locally modelled on Minkowski, anti-de Sitter or de Sitter space. It is well known that M admits a unique foliation by constant mean ... [more ▼]

Let M be a globally hyperbolic maximal compact 3-dimensional spacetime locally modelled on Minkowski, anti-de Sitter or de Sitter space. It is well known that M admits a unique foliation by constant mean curvature surfaces. In this paper we extend this result to singular spacetimes with particles (cone singularities of angles less than π along time-like geodesics). [less ▲]

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See detail#Soapboxscience – Hochbegabung kommunizieren.
Baudson, Tanja UL

E-print/Working paper (2017)

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See detailSub-Laplacian comparison theorems on totally geodesic Riemannian foliations
Baudoin, Fabrice; Grong, Erlend; Kuwada, Kazumasa et al

E-print/Working paper (2017)

We develop a variational theory of geodesics for the canonical variation of the metric of a totally geodesic foliation. As a consequence, we obtain comparison theorems for the horizontal and vertical ... [more ▼]

We develop a variational theory of geodesics for the canonical variation of the metric of a totally geodesic foliation. As a consequence, we obtain comparison theorems for the horizontal and vertical Laplacians. In the case of Sasakian foliations, we show that sharp horizontal and vertical comparison theorems for the sub-Riemannian distance may be obtained as a limit of horizontal and vertical comparison theorems for the Riemannian distances approximations. [less ▲]

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See detailHochbegabt ist, wer der Menschheit nützt.
Baudson, Tanja UL

E-print/Working paper (2017)

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See detailMulti-oriented props and homotopy algebras with branes
Merkulov, Sergei UL

E-print/Working paper (2017)

We introduce a new category of differential graded {\em multi-oriented}\, props whose representations (called homotopy algebras with branes) in a graded vector space require a choice of a collection of $k ... [more ▼]

We introduce a new category of differential graded {\em multi-oriented}\, props whose representations (called homotopy algebras with branes) in a graded vector space require a choice of a collection of $k$ linear subspaces in that space, $k$ being the number of extra directions (if $k=0$ this structure recovers an ordinary prop); symplectic vector spaces equipped with $k$ Lagrangian subspaces play a distinguished role in this theory. Manin triples is a classical example of an algebraic structure (concretely, a Lie bialgebra structure) given in terms of a vector space and its subspace; in the context of this paper Manin triples are precisely symplectic Lagrangian representations of the {\em 2-oriented} generalization of the classical operad of Lie algebras. In a sense, the theory of multi-oriented props provides us with a far reaching strong homotopy generalization of Manin triples type constructions. [less ▲]

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See detailDeformations of pre-symplectic structures and the Koszul L-infty-algebra
Schätz, Florian UL; Zambon, Marco

E-print/Working paper (2017)

We study the deformation theory of pre-symplectic structures, i.e. closed two-forms of fixed rank. The main result is a parametrization of nearby deformations of a given pre-symplectic structure in terms ... [more ▼]

We study the deformation theory of pre-symplectic structures, i.e. closed two-forms of fixed rank. The main result is a parametrization of nearby deformations of a given pre-symplectic structure in terms of an $L_\infty$-algebra, which we call the Koszul $L_\infty$-algebra. This $L_\infty$-algebra is a cousin of the Koszul dg Lie algebra associated to a Poisson manifold, and its proper geometric understanding relies on Dirac geometry. In addition, we show that a quotient of the Koszul $L_{\infty}$-algebra is isomorphic to the $L_\infty$-algebra which controls the deformations of the underlying characteristic foliation. Finally, we show that the infinitesimal deformations of pre-symplectic structures and of foliations are both obstructed. [less ▲]

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See detailMarch for Science – auf die Straße für freie Wissenschaft und Demokratie!
Baudson, Tanja UL

E-print/Working paper (2017)

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See detailReassessment Of Lesion-Associated Gene And Variant Pathogenicity In Focal Human Epilepsies
Neupert, Lisa Marie; Nothnagel, Michael; May, Patrick UL et al

E-print/Working paper (2017)

Purpose: Increasing availability of surgically resected brain tissue from Focal Cortical Dysplasia and low-grade epilepsy-associated tumor patients fostered large-scale genetic examination. However ... [more ▼]

Purpose: Increasing availability of surgically resected brain tissue from Focal Cortical Dysplasia and low-grade epilepsy-associated tumor patients fostered large-scale genetic examination. However, assessment of germline and somatic variant pathogenicity remains difficult. Methods: Here, we critically reevaluated the pathogenicity for all neuropathology-associated variants reported to date in the PubMed and ClinVar databases, including 12 disease-related genes and 88 neuropathology-associated missense variants. We (1) assessed evolutionary gene constraint using the pLI and missense z scores, (2) applied guidelines by the American College of Medical Genetics and Genomics (ACMG), and (3) predicted pathogenicity by using PolyPhen-2, CADD, and GERP. Results: Constraint analysis classified only seven out of 12 genes to be likely disease-associated, while 35 (40\%) of those 88 variants were classified as being variants of unknown significance (VUS) and 53 (60\%) as being likely pathogenic (LPII). Pathogenicity prediction yielded discrimination between neuropathology-associated variants (LPII and VUS) and rare variant scores obtained from individuals present in the Genome Aggregation Database (gnomAD). Conclusion: We conclude that several VUS are likely disease-associated and will be reclassified by future molecular evidence. In summary, interpretation of lesion-associated gene variants remains complex while the application of current ACMG guidelines including bioinformatic pathogenicity prediction will help improving interpretation and prediction. [less ▲]

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See detailThe Spectrum Of De Novo Variants In Neurodevelopmental Disorders With Epilepsy
Heyne, Henrike O.; EuroEPINOMICS RES Consortium; Abou Jamra, Rami et al

E-print/Working paper (2017)

Neurodevelopmental disorders (NDD) with epilepsy constitute a complex and heterogeneous phenotypic spectrum of largely unclear genetic architecture. We conducted exome-wide enrichment analyses for protein ... [more ▼]

Neurodevelopmental disorders (NDD) with epilepsy constitute a complex and heterogeneous phenotypic spectrum of largely unclear genetic architecture. We conducted exome-wide enrichment analyses for protein-altering de novo variants (DNV) in 7088 parent-offspring trios with NDD of which 2151 were comorbid with epilepsy. In this cohort, the genetic spectrum of epileptic encephalopathy (EE) and nonspecific NDD with epilepsy were markedly similar. We identified 33 genes significantly enriched for DNV in NDD with epilepsy, of which 27.3 were associated with therapeutic consequences. These 33 DNV-enriched genes were more often associated with synaptic transmission but less with chromatin modification when compared to NDD without epilepsy. On average, only 53 of the DNV-enriched genes were represented on available diagnostic sequencing panels, so our findings should drive significant improvements of genetic testing approaches. [less ▲]

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See detailWas beforschen Intelligenzforscher?
Baudson, Tanja UL

E-print/Working paper (2017)

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See detailLa grande région SaarLorLux, riche de ses travailleurs frontaliers
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

E-print/Working paper (2016)

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