"Source: Text/Geometry/GrpPSL2.text";
"Line: 402";
"Date: Tue Jun  7 22:27:14 2016";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/GrpPSL2.text, line: 402
// Example: H142E3 ()
print "Example: H142E3";
ei := GetEchoInput();
SetEchoInput(true);
G := CongruenceSubgroup(0,12);
Generators(G);
C := CosetRepresentatives(G);
H<i,r> := UpperHalfPlaneWithCusps();
triangle := [H|Infinity(),r,r-1];
translates := [g*triangle : g in C];
SetEchoInput(ei);
