3 papers
math.RT2017
The tensor product of Gorenstein-projective modules over category algebras
Ren Wang
For a finite free and projective EI category, we prove that Gorenstein-projective modules over its category algebra are closed under the tensor product if and only if each morphism…
math.RT2016
The MCM-approximation of the trivial module over a category algebra
Ren Wang
For a finite free EI category, we construct an explicit module over its category algebra. If in addition the category is projective over the ground field, the constructed module is…
math.RT2014
Gorenstein triangular matrix rings and category algebras
Ren Wang
We give conditions on when a triangular matrix ring is Gorenstein of a given selfinjective dimension. We apply the result to the category algebra of a finite EI category. In partic…