"Source: Text/Geometry/Polyhedra.text";
"Line: 655";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/Polyhedra.text, line: 655
// Example: H156E3 ()
print "Example: H156E3";
ei := GetEchoInput();
SetEchoInput(true);
C := PositiveQuadrant(3);
C;
M := Dual(Ambient(C));
P := Polyhedron(C, M ! [1,2,3], 1);
IsPolytope(P);
assert $1;
Q := Polyhedron(C, M ! [1,-2,3], 1 );
IsPolytope(Q);
assert not $1;
Q;
R := Polyhedron(C, M ! [1,2,3], -5);
R;
SetEchoInput(ei);
