"Source: Text/Geometry/Scheme.text";
"Line: 6522";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/Scheme.text, line: 6522
// Example: H122E50 ()
print "Example: H122E50";
ei := GetEchoInput();
SetEchoInput(true);
k := FiniteField(23);
A<x,y,z> := AffineSpace(k,3);              
M := Matrix(k,4,4,[1,2,3,-4,2,3,5,6,3,4,5,9,4,5,6,0]);
phi := Projectivity(A,M);
KA<u,v,w> := Parent(x/y);
phi;
Type(phi);
IsRegular(phi);
assert not $1;
SetEchoInput(ei);
