关于基本群上的子群拓扑
On Subgroup Topologies on Fundamental Groups
摘要:
利用拓扑空间的基本群的覆盖子群在拓扑化基本群中的拓扑性质对它们进行分类是很重要的。本文引入并研究了基本群上的一些拓扑,并利用它们对拓扑空间的覆盖、半覆盖和广义覆盖进行了分类。为了做到这一点,我们使用的概念,子群拓扑群,并讨论它们的性质。特别是,我们探讨这些拓扑使基本群的拓扑群。此外,我们还提供了一些拓扑空间的例子来比较基本群的拓扑。
英文摘要:
It is important to classify covering subgroups of the fundamental group of a topological space using their topological properties in the topologized fundamental group. In this paper, we introduce and study some topologies on the fundamental group and use them to classify coverings, semicoverings, and generalized coverings of a topological space. To do this, we use the concept of subgroup topology on a group and discuss their properties. In particular, we explore which of these topologies make the fundamental group a topological group. Moreover, we provide some examples of topological spaces to compare topologies of fundamental groups.
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