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D.13.2.54 numberOfConesOfDimension
Procedure from library gfan.lib (see gfan_lib).
- Usage:
- numberOfConesOfDimension(f,d[,m]); f fan, d int, m int
- Assume:
- d is between 0 and ambientDimension(f)
- Return:
- cone, returns in the fan f the number of cones in dimension d
if m!=0, it will only count maximal cones
Example:
| | LIB "gfan.lib";
fan f=emptyFan(3);
ncones(f);
==> 0
intmat M[3][3]=
1,0,0,
0,1,0,
0,0,1;
cone c=coneViaPoints(M);
insertCone(f,c);
numberOfConesOfDimension(f,0,0);
==> 1
numberOfConesOfDimension(f,0,1);
==> 0
numberOfConesOfDimension(f,1,0);
==> 3
numberOfConesOfDimension(f,0,1);
==> 0
numberOfConesOfDimension(f,2,0);
==> 3
numberOfConesOfDimension(f,2,1);
==> 0
numberOfConesOfDimension(f,3,0);
==> 1
numberOfConesOfDimension(f,3,1);
==> 1
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