Quasiperiodic motion for the pentagram map

Valentin Ovsienko, Richard Schwartz, Serge Tabachnikov

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The pentagram map is a projectively natural iteration defined on polygons, and also on a generalized notion of a polygon which we call twisted polygons. In this note we describe our recent work on the pentagram map, in which we find a Poisson structure on the space of twisted polygons and show that the pentagram map relative to this Poisson structure is completely integrable in the sense of Arnold-Liouville. For certain families of twisted polygons, such as those we call universally convex, we translate the integrability into a statement about the quasi-periodic motion of the pentagram-map orbits. We also explain how the continuous limit of the pentagram map is the classical Boussinesq equation, a completely integrable P.D.E.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalElectronic Research Announcements of the American Mathematical Society
Volume16
DOIs
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Mathematics(all)

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