An outline of obstruction theories of extensions via track categories

Autor:	Pirashvili, Mariam
Rok vydání:	2020
Předmět:	Mathematics - Category Theory
Druh dokumentu:	Working Paper
Popis:	Abelian track categories can be classified via the third Baues-Wirsching cohomology of small categories. This approach is used in this paper to compare and classify different generalisations of the obstruction theory of non-abelian group extensions, due to Cegarra, Garz\'on and Grandjean, Cegarra, Garz\'on and Ortega, and Chen, Du and Wang.
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2002.06671 Zobrazit plný text záznamu View this record from Arxiv