"Source: Text/Geometry/Polyhedra.text";
"Line: 2151";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/Polyhedra.text, line: 2151
// Example: H156E17 ()
print "Example: H156E17";
ei := GetEchoInput();
SetEchoInput(true);
L := ToricLattice(2);
L;
M := Dual(L);
M;
M eq L;
assert not $1;
L eq Dual(M);
assert $1;
SetEchoInput(ei);
