*s-tuple and *n-tuple of Covariant Functors
S. Al-Nofayee · Journal of Advances in Mathematics and Computer Science · 2015
A right A-module M is a -module provided that M is self-small and any exact sequence 0 → N → L → Q → 0, with L, Q ∈ Stat(M) remains exact after applying the functor HomA(M, -) if and only if N ∈ Stat(M). A right A-module M is called a -module if it is self-small, (n + 1)-quasi-...