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Results 1-20 of 170.
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The low-dimensional algebraic cohomology of the Witt and the Virasoro algebra with values in natural modules Ecker, Jill Marie-Anne ; Schlichenmaier, Martin in Banach Center Publications (2020) The main aim of this contribution is to compute the low-dimensional algebraic cohomology of the Witt and the Virasoro algebra with values in the adjoint and the trivial module. The last section includes ... [more ▼] The main aim of this contribution is to compute the low-dimensional algebraic cohomology of the Witt and the Virasoro algebra with values in the adjoint and the trivial module. The last section includes results for the general tensor densities modules, presented without proof. One of our main results is that the third algebraic cohomology of the Witt algebra with values in the adjoint module vanishes, while it is one-dimensional for the Virasoro algebra. The first and the second algebraic cohomology of the Witt and the Virasoro algebra with values in tensor densities modules vanish for almost all modules. In the case they do not vanish, we give explicit expressions for the generating cocycles. In our work, we consider algebraic cohomology and not only the sub-complex of continuous cohomology, meaning we do not put any continuity constraints on the cochains. Consequently, our results are independent of any choice of an underlying topology, and valid for any concrete realizations of the considered Lie algebras. [less ▲] Detailed reference viewed: 66 (2 UL)Some naturally defined star products for Kaehler manifolds Schlichenmaier, Martin Scientific Conference (2019, September 10) Detailed reference viewed: 27 (0 UL)N point Virasoro algebras are multi-point Krichever Novikov type algebras Schlichenmaier, Martin Scientific Conference (2019, June 28) Detailed reference viewed: 49 (0 UL)Canonical quantization for compact quantizable Kaehler manifolds Schlichenmaier, Martin Scientific Conference (2019, May 02) Detailed reference viewed: 46 (1 UL)N point Virasoro algebras are multi-point Krichever Novikov type algebras Schlichenmaier, Martin Scientific Conference (2019, March 19) Detailed reference viewed: 56 (0 UL)Krichever-Novivkov type algebras. A general review and the genus zero case Schlichenmaier, Martin E-print/Working paper (2019) In the first part of this survey we recall the definition and some of the constructions related to Krichever--Novikov type algebras. Krichever and Novikov introduced them for higher genus Riemann surfaces ... [more ▼] In the first part of this survey we recall the definition and some of the constructions related to Krichever--Novikov type algebras. Krichever and Novikov introduced them for higher genus Riemann surfaces with two marked points in generalization of the classical algebras of Conformal Field Theory. Schlichenmaier extended the theory to the multi-point situation and even to a larger class of algebras. The almost-gradedness of the algebras and the classification of almost-graded central extensions play an important role in the theory and in applications. In the second part we specialize the construction to the genus zero multi-point case. This yields beside instructive examples also additional results. In particular, we construct universal central extensions for the involved algebras, which are vector field algebras, differential operator algebras, current algebras and Lie superalgebras. We point out that the recently (re-)discussed $N$-Virasoro algebras are nothing else as multi-point genus zero Krichever-Novikov type algebras. The survey closes with structure equations and central extensions for the three-point case. [less ▲] Detailed reference viewed: 108 (0 UL)Berezin-Toeplitz quantization and naturally defined star products for Kähler manifolds Schlichenmaier, Martin in Analysis and Mathematical Physics (2018), 8(4), 691-710 Detailed reference viewed: 85 (5 UL)Krichever-Novikov Type Algebras and Wess-Zumino-Novikov-Witten Models Schlichenmaier, Martin in Uniformization, Riemann-Hilbert Correspondence, Calabi-Yau Manifolds, and Picard-Fuchs Equations (2018) Detailed reference viewed: 37 (5 UL)An Introduction to KN type algebras - A lecture course (5 lectures) Schlichenmaier, Martin Presentation (2018, June) Detailed reference viewed: 54 (3 UL)Krichever-Novikov type algebras. Definitions and Results Schlichenmaier, Martin E-print/Working paper (2018) Detailed reference viewed: 19 (0 UL)The low-dimensional algebraic cohomology of the Virasoro algebra Ecker, Jill Marie-Anne ; Schlichenmaier, Martin E-print/Working paper (2018) Detailed reference viewed: 57 (6 UL)The low-dimensional algebraic cohomology of the Witt and the Virasoro algebra Ecker, Jill Marie-Anne ; Schlichenmaier, Martin Poster (2018) Detailed reference viewed: 63 (6 UL)The low-dimensional algebraic cohomology of the Witt and the Virasoro algebra Ecker, Jill Marie-Anne ; Schlichenmaier, Martin in Journal of Physics. Conference Series (2018) Detailed reference viewed: 75 (7 UL)ICAMI 2017: International Conference on Applied Mathematics and Informatics: Forum on Analysis, Geometry, and Mathematical Physics Schlichenmaier, Martin ; ; et al in Analysis and Mathematical Physics (2018), 8 Detailed reference viewed: 97 (7 UL)An elementary proof of the formal rigidity of the Witt and Virasoro algebra Schlichenmaier, Martin Scientific Conference (2017, December 19) Detailed reference viewed: 63 (4 UL)Some naturally defined star products for Kaehler manifolds Schlichenmaier, Martin Scientific Conference (2017, November 27) Detailed reference viewed: 36 (4 UL)Introduction to Berezin-Toeplitz quantization Schlichenmaier, Martin Presentation (2017, July 05) Detailed reference viewed: 63 (8 UL)Travaux mathematiques, Scientific contributions of the Centre for Quantum Geometry of Moduli Spaces, AQM Aarhus Denmark Schlichenmaier, Martin Book published by University of Luxembourg (2017) Detailed reference viewed: 109 (11 UL)Canonically defined star products for Kaehler manifolds Schlichenmaier, Martin Scientific Conference (2017, February 07) Detailed reference viewed: 37 (5 UL)Basic Algebraic Structures - Lecture notes for the MICS Schlichenmaier, Martin Learning material (2017) Detailed reference viewed: 194 (12 UL) |
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