"Source: Text/Basics/RngPol.text";
"Line: 356";
"Date: Fri Sep 26 14:29:19 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Basics/RngPol.text, line: 356
// Example: H24E3 ()
print "Example: H24E3";
ei := GetEchoInput();
SetEchoInput(true);
Z := Integers();
Q := RationalField();
P<x> := PolynomialRing(Z);
S<y>, h := ChangeRing(P, Q);
h(x^3-2*x+5);
S ! (x^3-2*x+5);
m := hom< Z -> Q | x :-> 3*x >;
S<y>, h := ChangeRing(P, Q, m);
h(x^3-2*x+5);
SetEchoInput(ei);
