"Source: Text/Geometry/Scheme.text";
"Line: 4869";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/Scheme.text, line: 4869
// Example: H122E31 ()
print "Example: H122E31";
ei := GetEchoInput();
SetEchoInput(true);
P<x,y,z,t> := ProjectiveSpace(Rationals(),3);
S := Scheme (P, [3*x^2+3*y^2-z^2-t^2,z^2+t^2]);
Reduction(S,3);
SetEchoInput(ei);
