# cohomology -- general cohomology functor

## Description

cohomology -- a method name available for computing expressions of the forms HH^i(X) and HH^i(M,N).

If it is intended that i be of class ZZ, M be of class A, and N be of class B, then the method can be installed with

     cohomology(ZZ, A, B) := opts -> (i,M,N) -> ...