G-groupoids, crossed modules and the fundamental groupoid of a topological group

✍ Scribed by Ronald Brown; Christopher B Spencer

• Publisher: Elsevier Science
• Year: 1976
• Weight: 427 KB
• Volume: 79
• Category: Article
• ISSN: 1385-7258
• DOI: 10.1016/1385-7258(76)90068-8

✦ Synopsis

INTRODUUTION By a 8-groupoid is meant a group object in the category of groupoids. By a crossed m&.&. (A, B, b) is meant a pair A, B of groups together with an operation of the group B on the group A, and a morphism b: A + B of groups, satisfying: (i) b(a*