"Source: Text/Basics/FldRe.text";
"Line: 3913";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Basics/FldRe.text, line: 3913
// Example: H26E14 ()
print "Example: H26E14";
ei := GetEchoInput();
SetEchoInput(true);
f := func<x|Exp(2*x)>;
NumericalDerivative(f, 10, ComplexField(30)! 1.0) / f (1.0);
NumericalDerivative(func<x|LogGamma(x)>,1,ComplexField()!3.0);
Psi(3.0); // Psi is Gamma'/Gamma
SetEchoInput(ei);
