HH^ZZ ChainComplexMap  cohomology of a chain complex map
Synopsis

Function: cohomology

 Usage:
 HH^i f

Inputs:

Optional inputs:

Degree (missing documentation) => ..., default value 0,

Outputs:

a matrix, the ith cohomology map induced by the chain complex map f
Description
The command provides the map on the ith cohomology module induced by a map f of chain complexes.
See also

cohomology  general cohomology functor

HH  general homology and cohomology functor

ChainComplex  the class of all chain complexes