Gcd is the inert form of gcd.
Gcd returns the gcd (greatest common divisor) of two polynomials (or of a list of polynomials or of a sequence of polynomials) without evaluation.
It is used in conjunction with mod in Maple syntax mode to compute the gcd of two polynomials with coefficients in ℤ/pℤ with p prime (see also 5.28.7).
Input in Xcas mode :
you need to eval(ans()) to get :
Input in Maple mode :
^2+2*x-3) mod 13
^2+6*x+5) mod 5