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Amenability of Discrete Groups by Examples.

Amenability of Discrete Groups by Examples.

・ISBN 978-1-4704-7032-6 paper US$ 125.00

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お気に入り
著者・編者Juschenko, Kate,
シリーズMathematical Surveys and Monographs
出版社(American Mathematical Society, US)
出版年月2022
ページ数167 pp.
言語ENG
ニュース番号<M25-1950>

解説

The main topic of the book is amenable groups, i.e., groups on which there exist invariant finitely additive measures. It was discovered that the existence or non-existence of amenability is responsible for many interesting phenomena such as, e.g., the Banach-Tarski Paradox about breaking a sphere into two spheres of the same radius. Since then, amenability has been actively studied and a number of different approaches resulted in many examples of amenable and non-amenable groups.

In the book, the author puts together main approaches to study amenability. A novel feature of the book is that the exposition of the material starts with examples which introduce a method rather than illustrating it. This allows the reader to quickly move on to meaningful materialwithout learning and remembering a lot of additional definitions and preparatory results; those are presented after analyzing the main examples. The techniques that are used for proving amenability in this book are mainly a combination of analytic and probabilistic tools with geometric group theory.