334,553 research outputs found
The bisymplectomorphism group of a bounded symmetric domain
No full textIn a previous paper with A. Loi we introduced the so called symplectic duality between Hermitian symmetric spaces. Such duality consists in a bysimplectomorphism between an open and dense subset of a compact Hermitian symmetric space and its non-compact dual. The question about how many dualities does exists is directly related to the group of bi-symplectomorphism of a bounded symmetric domain of the complex euclidean space. In this paper we give a precise description of such group showing that its is a product of the isotropy group times the set of smooth function of the interval [0,1) to S^1. We study the group of bi-symplectomorphism of a bounded symmetric domai
Mantova a Londra : ipotesi su alcuni disegni al Victoria and Albert Museum
No full textPresso il Victoria and Albert Museum di Londra è custodita una raccolta di disegni, la cosiddetta “Moody Collection”, dal nome di Francis Wollaston Moody, l’artista inglese che li acquisì alla fine dell’Ottocento. Si tratta di una miscellanea di 68 fogli, prevalentemente di architettura, tutti databili tra il primo Cinquecento e la fine del Settecento. Della raccolta fanno parte circa venti disegni riferibili a progetti rinascimentali di area milanese e lombarda, tutti di grande interesse. Sono proposte alcune nuove ipotesi attributive ed è illustrato il progetto di catalogazione completa del fondo
Symplectic duality of Symmetric Spaces
No full textWe show that between symmetric spaces of different types there exists a bi-symplectic map. We compute the duality map explicitely by using the theory of Jordan Algebra
La stratégie du SMTC en faveur de l'accessibilité des transports en commun aux personnes à mobilité réduite au regard de la loi du 11 février 2005
No full textLa loi du 11 février 2005 pour l'égalité des droits et des chances, la participation et la citoyenneté des personnes handicapées a instauré de nouvelles obligations aux autorités organisatrices de transports. Ces obligations sont, pour la première fois, assorties de mesures coercitives. Le Syndicat Mixte des Transports en Commun de l'agglomération grenobloise mène depuis le milieu des années 1980 une politique ambitieuse en faveur de l'accessibilité des transports en commun aux personnes à mobilité réduite : innovation mondiale du premier tramway à plancher bas en 1987, une première ligne de bus déclarée accessible en 1996. La concertation est la clé de voûte de cette dynamique. L'année 2006 marque un nouvel essor pour l'accessibilité des transports en commun de l'agglomération grenobloise par la formalisation d'un certain nombre d'outils et d'instances de concertation ou encore l'élaboration du PDU 2006-2012 de l'agglomération grenobloise qui contient désormais une annexe dédiée.transports en commun, accessibilité, PMR (Personnes à mobilité réduite), personnes handicapées, PDU (Plan de Déplacements Urbains), Grenoble (France)
Equilibrium selection under changes in endowments: A geometric approach
No full textIn this paper we propose a geometric approach to the selection of the equilibrium price. After a perturbation of the parameters, the new price is selected thorough the composition of two maps: the projection on the linearization of the equilibrium manifold, a method that underlies econometric modeling, and the exponential map, that associates a tangent vector with a geodesic on the manifold. As a corollary of our main result, we prove the equivalence between zero curvature and uniqueness of equilibrium in the case of an arbitrary number of goods and two consumers, thus extending the previous result by Loi and Matta (2018).(c) 2023 Elsevier B.V. All rights reserved
Riemannian geometry of Hartogs domains
No full textThis paper contains several results on the Riemannian geometry of the so called Hartogs domain
Robustness of statistical manifolds
No full textTopology consisting of statistical structures induced by ( Gromov implicit function theorem, we show robustness of the generic statistical structure induced on M by the standard linear statistical structure on RN , for N sufficiently large. A statistical structure (g, T) on a smooth manifold M induced by ( said to be robust if there exists an open neighborhood of (g, T) in the fine C infinity- T tilde ). Using Nash- tilde M, g tilde , T tilde ) is tilde M, g tilde ,(c) 2023 Elsevier B.V. All rights reserved
Convergence en loi de Dirichlet de certaines intégrales stochastiques
No full textRécemment, Bouleau a proposé une extension du principe d'invariance fonctionnelle de Donsker qui met en évidence la convergence en loi de Dirichlet d'une marche aléatoire erronée vers la structure d'Ornstein-Uhlenbeck sur l'espace de Wiener. Le but de cet article est d'étendre ce résultat à certaines familles d'intégrales stochastiques.Principe d'invariance, intégrales stochastiques, formes de Dirichlet, opérateur carré du champ, domaine vectoriel, erreurs.
Probability over Płonka sums of Boolean algebras: States, metrics and topology
No full textThe paper introduces the notion of state for involutive bisemilattices, a variety which plays the role of algebraic counterpart of weak Kleene logics and whose elements are represented as Płonka sums of Boolean algebras. We investigate the relations between states over an involutive bisemilattice and probability measures over the (Boolean) algebras in the Płonka sum representation and, the direct limit of these algebras. Moreover, we study the metric completion of involutive bisemilattices, as pseudometric spaces, and the topology induced by the pseudometric
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