"Source: Text/Incidence/Graph.text";
"Line: 4216";
"Date: Fri Sep 26 12:10:10 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Incidence/Graph.text, line: 4216
// Example: H162E15 ()
print "Example: H162E15";
ei := GetEchoInput();
SetEchoInput(true);
G:=Graph< 5 | [{2,5}, {1,3,5}, {2,4,5}, {3,5}, {1,2,3,4} ]>;
ChromaticNumber(G);
assert $1 eq 3;
OptimalVertexColouring(G);
ChromaticIndex(G);
assert $1 eq 4;
OptimalEdgeColouring(G);
ChromaticPolynomial(G);
SetEchoInput(ei);
