"Source: Text/Commut/RngDiff.text";
"Line: 1318";
"Date: Wed Sep 19 23:00:01 2018";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/Commut/RngDiff.text, line: 1318
// Example: H118E24 ()
print "Example: H118E24";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
R<D> := DifferentialOperatorRing(F);
L := z^2*D^2-z*D+1;
P<Y1,Y2> := DifferentialRingExtension(L);
P;
Derivative(Y1);
Derivative(Y2);
SetEchoInput(ei);
