"Source: Text/Group/GrpMatGen.text";
"Line: 3296";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Group/GrpMatGen.text, line: 3296
// Example: H66E20 ()
print "Example: H66E20";
ei := GetEchoInput();
SetEchoInput(true);
GL42 := GeneralLinearGroup(4, GF(2));
Ominus42 := sub< GL42 | [1,0,0,0, 1,1,0,1, 1,0,1,0, 0,0,0,1 ],
                              [0,1,0,0, 1,0,0,0, 0,0,1,0, 0,0,0,1 ],
                              [0,1,0,0, 1,0,0,0, 0,0,1,0, 0,0,1,1 ] >;
Order(Ominus42);
assert $1 eq 120;
H := sub< Ominus42 | $.1, $.3 >;
N := ncl< Ominus42 | $.1, $.3 >;
Order(N);
assert $1 eq 60;
SetEchoInput(ei);
