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arXiv 1302.6536math.GTmath.GRmath.KT
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曲面辫群及其群环的下代数K理论综述

A survey of surface braid groups and the lower algebraic K-theory of their group rings

John Guaschi, Daniel Juan-Pineda

摘要:

本文综述了面辫群的理论及其群环的下代数K理论。我们回顾几个定义和描述的各种性质的表面辫群,如存在的扭转,有序性,线性,以及它们的关系与映射类群和与同伦群的2-球面。2-球面和实射影平面的辫群由于具有有穷级的元素而引起人们的特别兴趣,我们详细讨论了它们的挠率以及它们的有限子群和虚循环子群的分类.最后,我们概述的方法来研究较低的代数K理论的群环的表面辫群,突出最近的结果有关的辫群的2-球面和真正的射影平面。

英文摘要:

We give a survey of the theory of surface braid groups and the lower algebraic K-theory of their group rings. We recall several definitions and describe various properties of surface braid groups, such as the existence of torsion, orderability, linearity, and their relation both with mapping class groups and with the homotopy groups of the 2-sphere. The braid groups of the 2-sphere and the real projective plane are of particular interest because they possess elements of finite order, and we discuss in detail their torsion and the classification of their finite and virtually cyclic subgroups. Finally, we outline the methods used to study the lower algebraic K-theory of the group rings of surface braid groups, highlighting recent results concerning the braid groups of the 2-sphere and the real projective plane.

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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