"Source: Text/Group/GrpMatGen.text";
"Line: 1362";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Group/GrpMatGen.text, line: 1362
// Example: H66E9 ()
print "Example: H66E9";
ei := GetEchoInput();
SetEchoInput(true);
G := MatrixGroup<2,Integers()|[1,1,0,1],[0,1,-1,0]>;
IsFinite(G);
assert not $1;
G24, e := ChangeRing(G, Integers(24));
Order(G24);
assert $1 eq 9216;
G.-1*G.2;
(G.-1*G.2) @ e;
(G24.2^2) @@ e;
SetEchoInput(ei);
