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D.13.1.9 coneLink

Procedure from library gfan.lib (see gfan_lib).

Usage:
coneLink(c,w); c cone, w intvec/bigintmat

Return:
cone, the link of c around w

Example:
 
LIB "gfan.lib";
intmat M[3][3]=
1,0,0,
0,1,0,
0,0,1;
cone c=coneViaPoints(M);
intvec v=1,0,0;
cone cv=coneLink(c,v);
rays(cv);
==> 0,1,0,
==> 0,0,1
generatorsOfLinealitySpace(cv);
==> -1,0,0
intvec w=1,1,1;
cone cw=coneLink(c,w);
rays(cw);
==> 
generatorsOfLinealitySpace(cw);
==> -1, 0, 0,
==>  0,-1, 0,
==>  0, 0,-1