D.16.2.20 isSmooth

Syntax:

Polymake::isSmooth( cone c )
Polymake::isSmooth( fan f )
Polymake::isSmooth( polytope p )

Type:

int

Purpose:

1 if c, f or p is smooth, 0 otherwise.

Example:

LIB"polymake.lib"; intmat M[2][2]=1,0, 0,1; cone c1 = coneViaPoints(M); Polymake::isSmooth(c1); intmat N[3][3]=1,0, 1,2; cone c2 = coneViaPoints(N); Polymake::isSmooth(c2); intmat M[2][2]=1,0, 0,1; cone c = coneViaPoints(M); fan F1 = emptyFan(2); insertCone(F1,c); Polymake::isSmooth(F1); intmat N[3][3]=1,-2,-3, 1,1,0, 1,0,1; polytope q = polytopeViaPoints(N); fan F2 = Polymake::normalFan(q); Polymake::isSmooth(F2); intmat M[4][3]=1,2,0, 1,0,1, 1,2,1, 1,0,0; polytope p = polytopeViaPoints(M); Polymake::isSmooth(p); intmat N[3][3]=1,-2,-3, 1,1,0, 1,0,1; polytope q = polytopeViaPoints(N); Polymake::isSmooth(q);