D.4.3.15 kohom
..............
Procedure from library homolog.lib (see homolog_lib).

Usage:
kohom(A,k); A=matrix, k=integer

Return:
matrix Hom(R^k,A), i.e. 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 (R=basering).

Example:
LIB "homolog.lib";
ring r;
matrix n[2][3]=x,y,5,z,77,33;
print(kohom(n,3));
==> x,0,0,y, 0, 0, 5, 0, 0,
==> 0,x,0,0, y, 0, 0, 5, 0,
==> 0,0,x,0, 0, y, 0, 0, 5,
==> z,0,0,77,0, 0, 33,0, 0,
==> 0,z,0,0, 77,0, 0, 33,0,
==> 0,0,z,0, 0, 77,0, 0, 33

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&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; User manual for <a href="http://www.singular.uni-kl.de/"><i>Singular</i></a> version 2-0-4, October 2002,
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