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arXiv 2203.08591math.GRmath.CTmath.MG
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粗群导论

An Invitation to Coarse Groups

Arielle Leitner, Federico Vigolo

AI总结:

本文为粗群与粗作用建立理论基础,发展粗同态、粗商群和粗子群理论并证明粗版本同构定理,同时探讨其与数论、双不变度量、拟同态及拓扑群作用等经典领域的联系。

摘要:

在这本专著中,我们为粗群与粗作用的理论奠定基础。粗群是粗空间范畴中的群对象,可以理解为带有运算的集合,这些运算在“一致有界误差”的意义下满足群公理。在本工作的第一部分,我们发展了粗同态、粗商群和粗子群的理论,并证明了粗版本的群同构定理成立。我们还开创了对粗作用的研究,并说明它们如何与几何群论的基本观察相联系。在第二部分中,我们探讨了一系列专门主题,例如集合群上的粗群结构、粗自同构群以及受控映射空间。这里的主要目的是展示粗群理论如何与经典学科联系起来。这些学科包括:数论;群上双不变度量的研究;拟同态与稳定交换子长度;${\ m Out}(F_n)$;拓扑群作用。

英文摘要:

In this monograph we lay the foundation for a theory of coarse groups and coarse actions. Coarse groups are group objects in the category of coarse spaces, and can be thought of as sets with operations that satisfy the group axioms "up to uniformly bounded error". In the first part of this work, we develop the theory of coarse homomorphisms, quotients, and subgroups, and prove that coarse versions of the Isomorphism Theorems hold true. We also initiate the study of coarse actions and show how they relate to the fundamental observation of Geometric Group Theory. In the second part we explore a selection of specialized topics, such as the study of coarse group structures on set-groups, groups of coarse automorphisms and spaces of controlled maps. Here the main aim is to show how the theory of coarse groups connects with classical subjects. These include: number theory; the study of bi-invariant metrics on groups; quasimorphisms and stable commutator length; ${\rm Out}(F_n)$; topological group actions.

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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