"Source: Text/Geometry/GrpPSL2Shim.text";
"Line: 750";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/GrpPSL2Shim.text, line: 750
// Example: H143E5 ()
print "Example: H143E5";
ei := GetEchoInput();
SetEchoInput(true);
D := UnitDisc();
CC<I> := ComplexField();
z0 := D!0;
z1 := D!(1/2*I);
z2 := D!(1/2);
Distance(z0,z1);
Geodesic(z0,z1);
Geodesic(z1,z2);
TangentAngle(z0,z1);
TangentAngle(z1,z2);
Angle([z1,z2],[z1,z0]);
ArithmeticVolume([D | 1/2+1/2*I, -1/2+1/2*I, -1/2-1/2*I, 1/2-1/2*I]);
SetEchoInput(ei);
