Let $ R $ be a ring and $ n $ a fixed positive integer. A right $ R $-module $ M $ is called
strongly $ J $-$ n $-injective if every $ R $-homomorphism from an $ n $-generated small …

Let I be an ideal of a ring R. We call R weakly I-semiregular if R/I is a von Neumann regular
ring. This definition generalizes I-semiregular rings. We give a series of characterizations …