Liouville-arnold integrability of the pentagram map on closed polygons

Valentin Ovsienko, Richard Evan Schwartz, Sergei Tabachnikov

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The pentagram map is a discrete dynamical system defined on the moduli space of polygons in the projective plane. This map has recently attracted a considerable interest, mostly because its connection to a number of different domains, such as classical projective geometry, algebraic combinatorics, moduli spaces, cluster algebras, and integrable systems. Integrability of the pentagram map was conjectured by Schwartz and proved by the present authors for a larger space of twisted polygons. In this article, we prove the initial conjecture that the pentagram map is completely integrable on the moduli space of closed polygons. In the case of convex polygons in the real projective plane, this result implies the existence of a toric foliation on the moduli space. The leaves of the foliation carry affine structure and the dynamics of the pentagram map is quasiperiodic. Our proof is based on an invariant Poisson structure on the space of twisted polygons. We prove that the Hamiltonian vector fields corresponding to the monodromy invariants preserve the space of closed polygons and define an invariant affine structure on the level surfaces of the monodromy invariants.

Original languageEnglish (US)
Pages (from-to)2149-2196
Number of pages48
JournalDuke Mathematical Journal
Volume162
Issue number12
DOIs
StatePublished - Oct 14 2013

Fingerprint

Pentagram
Integrability
Polygon
Moduli Space
Closed
Affine Structure
Invariant
Monodromy
Projective plane
Foliation
Cluster Algebra
Projective geometry
Discrete Dynamical Systems
Poisson Structure
Convex polygon
Integrable Systems
Combinatorics
Vector Field
Leaves
Imply

All Science Journal Classification (ASJC) codes

  • Mathematics(all)

Cite this

Ovsienko, Valentin ; Schwartz, Richard Evan ; Tabachnikov, Sergei. / Liouville-arnold integrability of the pentagram map on closed polygons. In: Duke Mathematical Journal. 2013 ; Vol. 162, No. 12. pp. 2149-2196.
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Liouville-arnold integrability of the pentagram map on closed polygons. / Ovsienko, Valentin; Schwartz, Richard Evan; Tabachnikov, Sergei.

In: Duke Mathematical Journal, Vol. 162, No. 12, 14.10.2013, p. 2149-2196.

Research output: Contribution to journalArticle

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