"Source: Text/Commut/RngDiff.text";
"Line: 4109";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 4109
// Example: H121E73 ()
print "Example: H121E73";
ei := GetEchoInput();
SetEchoInput(true);
S<t>:=DifferentialLaurentSeriesRing(Rationals());
RS<DS> := DifferentialOperatorRing(S);
L:=DS^2-3/2*DS+(2*t-1)/(4*t);
rhf, bl := RightHandFactors(L);
bl;
assert &and $1;
#rhf eq 1;
assert $1;
rhf[1] eq L;
assert $1;
SetEchoInput(ei);
