4.22.3.12 dualCone

Syntax:

dualCone( cone c )

Type:

cone

Purpose:

the dual of the cone

Example:

LIB"gfanlib.so"; intmat M1[2][2]= 1,0, 0,1; cone c1=coneViaPoints(M1); cone d1=dualCone(c1); d1; ==> AMBIENT_DIM ==> 2 ==> INEQUALITIES ==> 0,1, ==> 1,0 ==> LINEAR_SPAN ==> ==> print(rays(d1)); ==> 1,0, ==> 0,1 intmat M2[2][2]= 1,1, 0,1; cone c2=coneViaPoints(M2); cone d2=dualCone(c2); d2; ==> AMBIENT_DIM ==> 2 ==> INEQUALITIES ==> 0,1, ==> 1,1 ==> LINEAR_SPAN ==> ==> print(rays(d2)); ==> 1,0, ==> -1,1