proposition: Lemma gdcop_map p q : (gdcop p q)^f = gdcop p^f q^f.
proof: Proof. by rewrite /gdcop gdcop_rec_map !size_map_poly. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop ssralg poly)