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Continuous crystal and Duistermaat–Heckman measure for Coxeter groups by Philippe Biane; Philippe Bougerol; Neil O'Connell is a Mathematics article available to read on EtoBox.

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We introduce a notion of continuous crystal analogous, for general Coxeter groups, to the combinatorial crystals introduced by Kashiwara in representation theory of Lie algebras. We explore their main properties in the case of finite Coxeter groups, where we use a generalization of the Littelmann path model to show the existence of the crystals. We introduce a remarkable measure, analogous to the Duistermaat-Heckman measure, which we interpret in terms of Brownian motion. We also show that the Littelmann path operators can be derived from simple considerations on Sturm-Liouville equations.

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Author

Philippe Biane; Philippe Bougerol; Neil O'Connell

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0001-8708)

Published

2009

Language

EN

Field

Mathematics (Physical Sciences)