"Source: Text/Commut/RngDiff.text";
"Line: 677";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 677
// Example: H121E11 ()
print "Example: H121E11";
ei := GetEchoInput();
SetEchoInput(true);
S<t> := DifferentialLaurentSeriesRing(Rationals());
RelativePrecisionOfDerivation(S);
V<w> := ChangeDerivation(S,t+O(t^6));
Derivation(V)(w);
RelativePrecisionOfDerivation(V);                       
assert $1 eq 5;
SetEchoInput(ei);
