proposition: Lemma coprimez_pexpr k m n : (0 < k)%N -> coprimez m (n ^+ k) = coprimez m n.
proof: Proof. by move=> k_gt0; rewrite !(coprimez_sym m) coprimez_pexpl. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop prime order) mathcomp(ssralg poly ssrnum ssrint archimedean rat matrix) mathcomp(polydiv perm zmodp mxalgebra vector)