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arXiv 1709.05949math.GR
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离散群与非离散群的有限与无限等价群

Finite and infinite quotients of discrete and indiscrete groups

Pierre-Emmanuel Caprace

摘要:

这些笔记致力于在树的产品和相关主题的格。他们提供了一个介绍的建设,由M。Burger和S. Mozes,这样的格的例子,是简单的抽象群。该建设的两个特点是强调:非离散的相关性局部紧群,和两个步骤的战略,在简单的证明,分别解决,并与完全不同的方法,存在的有限和无限的concurents。一个简短的历史的追求,产生和提出的无限单群也勾画。讨论了Kneser单纯性猜想的证明与Margulis的证明的比较,指出了有限单群分类的相关性.最后一章是致力于有限和无限的双曲群及其关系的渐近性质的有限单群。一路上讨论了许多开放的问题。

英文摘要:

These notes are devoted to lattices in products of trees and related topics. They provide an introduction to the construction, by M. Burger and S. Mozes, of examples of such lattices that are simple as abstract groups. Two features of that construction are emphasized: the relevance of non-discrete locally compact groups, and the two-step strategy in the proof of simplicity, addressing separately, and with completely different methods, the existence of finite and infinite quotients. A brief history of the quest for finitely generated and finitely presented infinite simple groups is also sketched. A comparison with Margulis' proof of Kneser's simplicity conjecture is discussed, and the relevance of the Classification of the Finite Simple Groups is pointed out. A final chapter is devoted to finite and infinite quotients of hyperbolic groups and their relation to the asymptotic properties of the finite simple groups. Numerous open problems are discussed along the way.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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