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Documents  Ovsienko, Valentin | enregistrements trouvés : 2

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The orbit method in geometry and physics :international conference in honor of A. A. Kirillovheld held at Luminy#CIRM#Dec. Duval, Christian ; Guieu, Laurent ; Ovsienko, Valentin | Birkhäuser 2003

Congrès

- 471 p.
ISBN 978-0-8176-4232-7

Progress in mathematics , 0213

Localisation : Collection 1er étage

méthode des orbites # Kirillov # mathématiques de la physique # représentation des groupes de Lie # groupe de Lie # algèbre de Lie # superalgèbre de Lie # sous-variété locale # quantification géométrique # déformation # analyse harmonique # géométrie de Poisson

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Pentagram map and combinatorics: more open questions than solutions Ovsienko, Valentin | CIRM H

Multi angle

Research talks;Algebra;Combinatorics

The pentagram map and its analogs act on interesting and complicated spaces. The simplest of them is the classical moduli space $M_{0,n}$ of rational curves of genus $0$. These moduli spaces have a rich combinatorial structure related to the notion of "Coxeter frieze pattern" and can be understood as a "cluster manifolds". In this talk, I will explain how to describe the action of the pentagram map (and its analogs) in terms of friezes. The main goal is to understand how does this action fit with the cluster algebra structure, in particular, with the canonical (pre)symplectic form. The pentagram map and its analogs act on interesting and complicated spaces. The simplest of them is the classical moduli space $M_{0,n}$ of rational curves of genus $0$. These moduli spaces have a rich combinatorial structure related to the notion of "Coxeter frieze pattern" and can be understood as a "cluster manifolds". In this talk, I will explain how to describe the action of the pentagram map (and its analogs) in terms of friezes. The main ...

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