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7.7.17.0. coHom
Procedure from library nchomolog.lib (see nchomolog_lib).

Usage:
coHom(A,k); A matrix, k int

Purpose:
compute the matrix of a homomorphism Hom(R^k,A), where R is the basering. Let A be a matrix defining a map F1-->F2 of free R-modules, then the matrix of Hom(R^k,F1)-->Hom(R^k,F2) is computed.

Note:
Both A and Hom(A,R^k) are matrices for either left or right R-module homomorphisms

Example:
 


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