|  |  D.13.1.31 negatedCone Procedure from librarygfan.lib(see  gfan_lib).
 
Example:Usage:
negatedCone(c); c cone
Return:
cone, the negative of c
 |  | LIB "gfan.lib";
intmat M[2][2]=
1,0,
0,1;
cone c=coneViaPoints(M);
cone cn=negatedCone(c);
print(rays(cn));
==> -1, 0,
==>  0,-1
 | 
 
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