"Source: Text/Commut/RngDiff.text";
"Line: 1373";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 1373
// Example: H121E26 ()
print "Example: H121E26";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
_<X> := PolynomialRing(F);
M<alpha> := ext< F | X^2-z >;
M;
alpha^2;
SetEchoInput(ei);
