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D.13.2.22 generatorsOfSpan

Procedure from library gfan.lib (see gfan_lib).

Usage:
generatorsOfSpan(c); c cone

Return:
bigintmat, generators of the span of c

Example:
 
LIB "gfan.lib";
intmat M[3][5]=
1,0,0,0,0,
0,1,0,0,0,
0,0,1,0,0;
cone c=coneViaPoints(M);
bigintmat S=generatorsOfSpan(c);
print(S);
==> -1, 0, 0,0,0,
==>  0,-1, 0,0,0,
==>  0, 0,-1,0,0

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