References of "Marichal, Jean-Luc 50002296"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 101 to 120 of 272     1 2 3 4 5 6 7 8 9 10 11     Classification of associative multivariate polynomial functionsMarichal, Jean-Luc ; Mathonet, Pierre Scientific Conference (2011, June)Detailed reference viewed: 62 (3 UL) Extensions of system signatures to dependent lifetimes: Explicit expressions and interpretationsMarichal, Jean-Luc ; Mathonet, Pierre in Journal of Multivariate Analysis (2011), 102(5), 931-936The concept of system signature was introduced by Samaniego for systems whose components have i.i.d. lifetimes. We consider its extension to the continuous dependent case and give an explicit expression ... [more ▼]The concept of system signature was introduced by Samaniego for systems whose components have i.i.d. lifetimes. We consider its extension to the continuous dependent case and give an explicit expression for this extension as a difference of weighted means of the structure function values. We then derive a formula for the computation of the coefficients of these weighted means in the special case of independent continuous lifetimes. Finally, we interpret this extended concept of signature through a natural least squares approximation problem. [less ▲]Detailed reference viewed: 95 (4 UL) Axiomatizations of signed discrete Choquet integralsCardin, Marta; Couceiro, Miguel ; Giove, Silvio et alin International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems (2011), 19(2), 193-199We study the so-called signed discrete Choquet integral (also called non-monotonic discrete Choquet integral) regarded as the Lovász extension of a pseudo-Boolean function which vanishes at the origin. We ... [more ▼]We study the so-called signed discrete Choquet integral (also called non-monotonic discrete Choquet integral) regarded as the Lovász extension of a pseudo-Boolean function which vanishes at the origin. We present axiomatizations of this generalized Choquet integral, given in terms of certain functional equations, as well as by necessary and sufficient conditions which reveal desirable properties in aggregation theory. [less ▲]Detailed reference viewed: 113 (3 UL) Associative polynomial functions over bounded distributive latticesCouceiro, Miguel ; Marichal, Jean-Luc in Order: A Journal on the Theory of Ordered Sets and its Applications (2011), 28(1), 1-8The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity n>=1 as well as to functions of multiple arities. In this paper, we investigate ... [more ▼]The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity n>=1 as well as to functions of multiple arities. In this paper, we investigate these two generalizations in the case of polynomial functions over bounded distributive lattices and present explicit descriptions of the corresponding associative functions. We also show that, in this case, both generalizations of associativity are essentially the same. [less ▲]Detailed reference viewed: 116 (6 UL) Indices de pouvoir et d'interaction en théorie des jeux coopératifs: une approche par moindres carrésMarichal, Jean-Luc ; Mathonet, Pierre Presentation (2011, January 18)Detailed reference viewed: 47 (1 UL) Aggregation functions: Construction methods, conjunctive, disjunctive and mixed classesGrabisch, Michel; Marichal, Jean-Luc ; Mesiar, Radko et alin Information Sciences (2011), 181(1), 23-43In this second part of our state-of-the-art overview on aggregation theory, based again on our recent monograph on aggregation functions, we focus on several construction methods for aggregation functions ... [more ▼]In this second part of our state-of-the-art overview on aggregation theory, based again on our recent monograph on aggregation functions, we focus on several construction methods for aggregation functions and on special classes of aggregation functions, covering the well-known conjunctive, disjunctive, and mixed aggregation functions. Some fields of applications are included. [less ▲]Detailed reference viewed: 149 (3 UL) Aggregation functions: MeansGrabisch, Michel; Marichal, Jean-Luc ; Mesiar, Radko et alin Information Sciences (2011), 181(1), 1-22This two-part state-of-the-art overview on aggregation theory summarizes the essential information concerning aggregation issues. An overview of aggregation properties is given, including the basic ... [more ▼]This two-part state-of-the-art overview on aggregation theory summarizes the essential information concerning aggregation issues. An overview of aggregation properties is given, including the basic classification on aggregation functions. In this first part, the stress is put on means, i.e., averaging aggregation functions, both with fixed arity (n-ary means) and with multiple arities (extended means). [less ▲]Detailed reference viewed: 139 (1 UL) Weighted Banzhaf power and interaction indexes through weighted approximations of gamesMarichal, Jean-Luc ; Mathonet, Pierre in Dubois, Didier; Grabisch, Michel; Mesiar, Radko (Eds.) et al 32nd Linz Seminar on Fuzzy Set Theory (LINZ 2011) - Decision Theory: Qualitative and Quantitative Approaches (2011)In cooperative game theory, various kinds of power indexes are used to measure the influence that a given player has on the outcome of the game or to define a way of sharing the benefits of the game among ... [more ▼]In cooperative game theory, various kinds of power indexes are used to measure the influence that a given player has on the outcome of the game or to define a way of sharing the benefits of the game among the players. The best known power indexes are due to Shapley [15,16] and Banzhaf [1,5] and there are many other examples of such indexes in the literature. When one is concerned by the analysis of the behavior of players in a game, the information provided by power indexes might be far insufficient, for instance due to the lack of information on how the players interact within the game. The notion of interaction index was then introduced to measure an interaction degree among players in coalitions; see [13,12,7,8,14,10,6] for the definitions and axiomatic characterizations of the Shapley and Banzhaf interaction indexes as well as many others. In addition to the axiomatic characterizations the Shapley power index and the Banzhaf power and interaction indexes were shown to be solutions of simple least squares approximation problems (see [2] for the Shapley index, [11] for the Banzhaf power index and [9] for the Banzhaf interaction index). We generalize the non-weighted approach of [11,9] by adding a weighted, probabilistic viewpoint: A weight w(S) is assigned to every coalition S of players that represents the probability that coalition S forms. The solution of the weighted least squares problem associated with the probability distribution w was given in [3,4] in the special case when the players behave independently of each other to form coalitions. In this particular setting we introduce a weighted Banzhaf interaction index associated with w by considering, as in [11,9], the leading coefficients of the approximations of the game by polynomials of specified degrees.We then study the most important properties of these weighted indexes and their relations with the classical Banzhaf and Shapley indexes. [less ▲]Detailed reference viewed: 125 (1 UL) On three properties of the discrete Choquet integralCouceiro, Miguel; Marichal, Jean-Luc in Dubois, Didier; Grabisch, Michel; Mesiar, Radko (Eds.) et al 32nd Linz Seminar on Fuzzy Set Theory (LINZ 2011) - Decision Theory: Qualitative and Quantitative Approaches (2011)Three important properties in aggregation theory are investigated, namely horizontal min-additivity, horizontal max-additivity, and comonotonic additivity, which are defined by certain relaxations of the ... [more ▼]Three important properties in aggregation theory are investigated, namely horizontal min-additivity, horizontal max-additivity, and comonotonic additivity, which are defined by certain relaxations of the Cauchy functional equation in several variables. We show that these properties are equivalent and we completely describe the functions characterized by them. By adding some regularity conditions, these functions coincide with the Lovász extensions vanishing at the origin, which subsume the discrete Choquet integrals. [less ▲]Detailed reference viewed: 60 (1 UL) Axiomatizations of the discrete Choquet integral and extensionsCouceiro, Miguel ; Marichal, Jean-Luc in Galichet, Sylvie; Montero, Javier; Mauris, Gilles (Eds.) Proceedings of the 7th conference of the European Society for Fuzzy Logic and Technology (EUSFLAT-2011) and LFA-2011 (2011)Three important properties in aggregation theory are investigated, namely horizontal min-additivity, horizontal max-additivity, and comonotonic additivity, which are defined by certain relaxations of the ... [more ▼]Three important properties in aggregation theory are investigated, namely horizontal min-additivity, horizontal max-additivity, and comonotonic additivity, which are defined by certain relaxations of the Cauchy functional equation in several variables. We show that these properties are equivalent and we completely describe the functions characterized by them. By adding some regularity conditions, the latter functions coincide with the Lovász extensions vanishing at the origin, which subsume the discrete Choquet integrals. We also propose a simultaneous generalization of horizontal min-additivity and horizontal max-additivity, called horizontal median-additivity, and we describe the corresponding function class. Additional conditions then reduce this class to that of symmetric Lovász extensions, which includes the discrete symmetric Choquet integrals. [less ▲]Detailed reference viewed: 116 (2 UL) Quasi-polynomial functions over bounded distributive latticesCouceiro, Miguel ; Marichal, Jean-Luc in Aequationes Mathematicae (2010), 80(3), 319-334In [6] the authors introduced the notion of quasi-polynomial function as being a mapping $f\colon X^n\to X$ defined and valued on a bounded chain $X$ and which can be factorized as $f(x_1,\ldots,x_n)=p ... [more ▼]In [6] the authors introduced the notion of quasi-polynomial function as being a mapping$f\colon X^n\to X$defined and valued on a bounded chain$X$and which can be factorized as$f(x_1,\ldots,x_n)=p(\varphi(x_1),\ldots,\varphi(x_n))$, where$p$is a polynomial function (i.e., a combination of variables and constants using the chain operations$\wedge$and$\vee$) and$\varphi$is an order-preserving map. In the current paper we study this notion in the more general setting where the underlying domain and codomain sets are, possibly different, bounded distributive lattices, and where the inner function is not necessarily order-preserving. These functions appear naturally within the scope of decision making under uncertainty since, as shown in this paper, they subsume overall preference functionals associated with Sugeno integrals whose variables are transformed by a given utility function. To axiomatize the class of quasi-polynomial functions, we propose several generalizations of well-established properties in aggregation theory, as well as show that some of the characterizations given in [6] still hold in this general setting. Moreover, we investigate the so-called transformed polynomial functions (essentially, compositions of unary mappings with polynomial functions) and show that, under certain conditions, they reduce to quasi-polynomial functions. [less ▲]Detailed reference viewed: 152 (3 UL) Measuring the interactions among variables of functions over the unit hypercubeMarichal, Jean-Luc ; Mathonet, Pierre in Torra, Vicenc; Narukawa, Yasuo; Daumas, Marc (Eds.) Modeling Decisions for Artificial Intelligence: Proceedings 7th International Conference, MDAI 2010, Perpignan, France, October 27-29, 2010 (2010, October 19)By considering a least squares approximation of a given square integrable function$f\colon[0,1]^n\to\R$by a multilinear polynomial of a specified degree, we define an index which measures the overall ... [more ▼]By considering a least squares approximation of a given square integrable function$f\colon[0,1]^n\to\R$by a multilinear polynomial of a specified degree, we define an index which measures the overall interaction among variables of$f$. This definition extends the concept of Banzhaf interaction index introduced in cooperative game theory. Our approach is partly inspired from multilinear regression analysis, where interactions among the independent variables are taken into consideration. We show that this interaction index has appealing properties which naturally generalize the properties of the Banzhaf interaction index. In particular, we interpret this index as an expected value of the difference quotients of$f$or, under certain natural conditions on$f$, as an expected value of the derivatives of$f$. These interpretations show a strong analogy between the introduced interaction index and the overall importance index defined by Grabisch and Labreuche [7]. Finally, we discuss a few applications of the interaction index. [less ▲]Detailed reference viewed: 91 (3 UL) Measuring the influence of the kth largest variable on functions over the unit hypercubeMarichal, Jean-Luc ; Mathonet, Pierre in Torra, Vicenc; Narukawa, Yasuo; Daumas, Marc (Eds.) Modeling Decisions for Artificial Intelligence: Proceedings 7th International Conference, MDAI 2010, Perpignan, France, October 27-29, 2010 (2010, October 19)By considering a least squares approximation of a given square integrable function$f\colon [0,1]^n\to\R$by a shifted$L$-statistic function (a shifted linear combination of order statistics), we define ... [more ▼]By considering a least squares approximation of a given square integrable function$f\colon [0,1]^n\to\R$by a shifted$L$-statistic function (a shifted linear combination of order statistics), we define an index which measures the global influence of the$k$th largest variable on$f$. We show that this influence index has appealing properties and we interpret it as an average value of the difference quotient of$f$in the direction of the$k$th largest variable or, under certain natural conditions on$f$, as an average value of the derivative of$f$in the direction of the$k$th largest variable. We also discuss a few applications of this index in statistics and aggregation theory. [less ▲]Detailed reference viewed: 103 (4 UL) Explicit descriptions of associative Sugeno integralsCouceiro, Miguel ; Marichal, Jean-Luc in Hüllermeier, Eyke; Kruse, Rudolf; Hoffmann, Frank (Eds.) Information Processing and Management of Uncertainty in Knowledge-Based Systems: 13th International Conference, IPMU 2010, Dortmund, Germany, June 28–July 2, 2010. Proceedings, Part I (2010, June 17)The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity$n\geq 1$as well as to functions of multiple arities. In this paper, we ... [more ▼]The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity$n\geq 1\$ as well as to functions of multiple arities. In this paper, we investigate these two generalizations in the case of Sugeno integrals over bounded distributive lattices and present explicit descriptions of the corresponding associative functions. We also show that, in this case, both generalizations of associativity are essentially the same. [less ▲]Detailed reference viewed: 129 (2 UL) Solving Chisini's functional equationMarichal, Jean-Luc Scientific Conference (2010, June)Detailed reference viewed: 97 (8 UL) Solving Chisini's functional equationMarichal, Jean-Luc in Aequationes Mathematicae (2010), 79(3), 237-260We investigate the n-variable real functions G that are solutions of the Chisini functional equation F(x) = F(G(x),...,G(x)), where F is a given function of n real variables. We provide necessary and ... [more ▼]We investigate the n-variable real functions G that are solutions of the Chisini functional equation F(x) = F(G(x),...,G(x)), where F is a given function of n real variables. We provide necessary and sufficient conditions on F for the existence and uniqueness of solutions. When F is nondecreasing in each variable, we show in a constructive way that if a solution exists then a nondecreasing and idempotent solution always exists. We also provide necessary and sufficient conditions on F for the existence of continuous solutions and we show how to construct such a solution. We finally discuss a few applications of these results. [less ▲]Detailed reference viewed: 117 (11 UL) On two generalizations of associativityCouceiro, Miguel ; Marichal, Jean-Luc Scientific Conference (2010, June)Detailed reference viewed: 55 (14 UL) Characterizations of discrete Sugeno integrals as polynomial functions over distributive latticesCouceiro, Miguel ; Marichal, Jean-Luc in Fuzzy Sets and Systems (2010), 161(5), 694-707We discuss several characterizations of discrete Sugeno integrals over bounded distributive lattices as particular cases of lattice polynomial functions, that is, functions which can be represented in the ... [more ▼]We discuss several characterizations of discrete Sugeno integrals over bounded distributive lattices as particular cases of lattice polynomial functions, that is, functions which can be represented in the language of bounded lattices using variables and constants. We also consider the subclass of term functions as well as the classes of symmetric polynomial functions and weighted infimum and supremum functions, and present their characterizations, accordingly. Moreover, we discuss normal form representations of these functions. [less ▲]Detailed reference viewed: 125 (9 UL) Weighted Banzhaf interaction indexes and weighted least squaresMarichal, Jean-Luc ; Mathonet, Pierre Scientific Conference (2010, January)Detailed reference viewed: 38 (0 UL) Measuring the interactions among variables of functions over the unit hypercubeMarichal, Jean-Luc ; Mathonet, Pierre Scientific Conference (2010, January)Detailed reference viewed: 91 (2 UL)