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D.4.17.2 zero
Procedure from librarymodules.lib (see modules_lib).
- Usage:
- zero(n); n and m integer
- Return:
- returns the n x m zero matrix, with nongraded free modules for source and target
LIB "modules.lib";
ring r;
int n=4;
int m=3;
zero(n,m);
==> {0} {0} {0}
==> {0} 0 0 0
==> {0} 0 0 0
==> {0} 0 0 0
==> {0} 0 0 0
==>
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