Gorenstein homological dimensions of modules over triangular matrix rings

Rongmin Zhu, Zhongkui Liu, Zhanping Wang

Let $A$ and $B$ be rings, $U$ a $(B,A)$-bimodule and $T=\left(\begin{array}{cc}A& 0\\ U& B\end{array}\right)$ be the triangular matrix ring. In this paper, we chara…