The Octagonal PETs
Richard Evan Schwartz
A polytope exchange transformation is a (discontinuous) map from a polytope to itself that is a translation wherever it is defined. The 1-dimensional examples, interval exchange transformations, have been studied fruitfully for many years and have deep connections to other areas of mathematics, such as Teichmuller theory. This book introduces a general method for constructing polytope exchange transformations in higher dimensions and then studies the simplest example of the construction in detail. The simplest case is a 1-parameter family of polygon exchange transformations that turns out to be closely related to outer billiards on semi-regular octagons. The 1-parameter family admits a complete renormalization scheme, and this structure allows for a fairly complete analysis both of the system and of outer billiards on semi-regular octagons. The material in this book was discovered through computer experimentation. On the other hand, the proofs are traditional, except for a few rigorous computer-assisted calculations
Категории:
Год:
2014
Издательство:
American Mathematical Society
Язык:
english
Страницы:
226
ISBN 10:
1470415224
ISBN 13:
9781470415228
Серия:
Mathematical Surveys and Monographs 197
Файл:
PDF, 1.21 MB
IPFS:
,
english, 2014