Cograde conditions and cotorsion pairs

Xi Tang, Zhaoyong Huang

Let $R$ and $S$ be rings and ${}_R{\omega }_S$ a semidualizing bimodule. We study when the double functor $\Tor^S_i(ω, \Ext^i_{R}(ω,-))$ preserves epimorphisms and the double functor $\Ext_{…