论文标题
通过轨道类别的扩展理论的障碍理论概述
An outline of obstruction theories of extensions via track categories
论文作者
论文摘要
可以通过小型类别的第三个baues-wirsching共同体来对Abelian Track类别进行分类。本文使用这种方法来比较和分类非亚伯群体扩展理论的不同概括，这是由于Cegarra，Garzón和Grandjean，Cegarra，Cegarra，Garzón和Ortega和Ortega，以及Chen，Du和Wang。
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, Garzón and Grandjean, Cegarra, Garzón and Ortega, and Chen, Du and Wang.
