English

Outer Billiards with Contraction: Regular Polygons

Dynamical Systems 2015-02-10 v1

Abstract

We study outer billiards with contraction outside regular polygons. For regular nn-gons with n=3,4,5,6,8n = 3, 4, 5, 6, 8, and 1212, we show that as the contraction rate approaches 11, dynamics of the system converges, in a certain sense, to that of the usual outer billiards map. These are precisely the values of n3n \geq 3 with [Q(e2πi/n):Q]2[\mathbb{Q}(e^{2\pi i/n}):\mathbb{Q}] \leq 2. Then we discuss how such convergence may fail in the case of n=7n=7.

Keywords

Cite

@article{arxiv.1502.02359,
  title  = {Outer Billiards with Contraction: Regular Polygons},
  author = {In-Jee Jeong},
  journal= {arXiv preprint arXiv:1502.02359},
  year   = {2015}
}

Comments

17 pages

R2 v1 2026-06-22T08:25:08.164Z