"Source: Text/Commut/RngDiff.text";
"Line: 2774";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 2774
// Example: H121E50 ()
print "Example: H121E50";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
R<D> := DifferentialOperatorRing(F);
pl := Zeros(z-1)[1];
Rloc<Dloc>, mp, place:=  Localization(R,pl);
Domain(mp) eq R, Codomain(mp) eq Rloc;
place;
Differential(BaseRing(Rloc));
mp(D);
Dloc*(z-1);
L := D + z;
Lloc, mp, place := Localization(L,Zeros(z)[1]);
Lloc;
SetEchoInput(ei);
