4.23.1.9 isPure

Syntax:

isPure( fan f)

Type:

int

Purpose:

1 iff the fan is pure; 0 otherwise

Example:

LIB"gfanlib.so"; fan f=fullFan(2); isPure(f); ==> 1 fan g=emptyFan(2); intmat M1[2][2]= 1,0, 0,1; cone c1=coneViaPoints(M1); insertCone(g,c1); isPure(g); ==> 1 intmat M2[1][2]= 0,-1; cone c2=coneViaPoints(M2); insertCone(g,c2); isPure(g,c2); ==> 0