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D.13.1.29 linealityDimension

Procedure from library gfan.lib (see gfan_lib).

Usage:
linealityDimension(c); c cone
linealityDimension(f); f fan

Return:
int, the dimension of the lineality space of c resp f

Example:
 
LIB "gfan.lib";
intmat M1[3][3]=
1,0,0,
0,1,0,
0,0,1;
cone c1=coneViaPoints(M1);
linealityDimension(c1);
==> 0
intmat M2[4][3]=
1,0,0,
0,1,0,
0,0,1,
-1,0,0;
cone c2=coneViaPoints(M2);
linealityDimension(c2);
==> 1