作者
Saeed Nasseh, Sean Sather‐Wagstaff
发表日期
2017/8
期刊
Journal of the London Mathematical Society
卷号
96
期号
1
页码范围
271-292
简介
We apply geometric techniques from representation theory to the study of homologically finite differential graded (DG) modules over a finite dimensional, positively graded, commutative DG algebra . In particular, in this setting we prove a version of a theorem of Voigt by exhibiting an isomorphism between the Yoneda Ext group and a quotient of tangent spaces coming from an algebraic group action on an algebraic variety. As an application, we answer a question of Vasconcelos from 1974 by showing that a local ring has only finitely many semidualizing complexes up to shift‐isomorphism in the derived category .
学术搜索中的文章
S Nasseh, S Sather‐Wagstaff - Journal of the London Mathematical Society, 2017