The fundamental groupoid as a terminal costack

被引:2
作者
Pirashvili, Ilia [1 ]
机构
[1] Univ Leicester, Dept Math, Leicester LE1 7RH, Leics, England
关键词
Fundamental groupoid; costack; stack; axiomatisation; Seifert-van Kampen theorem;
D O I
10.1515/gmj-2015-0050
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
In this paper we prove that for good topological spaces the assignment U bar right arrow Pi(1)(U) is the terminal object in the 2-category of costacks over X. Here Pi(1)(U) denotes the fundamental groupoid of U.
引用
收藏
页码:563 / 571
页数:9
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