proposition: Lemma irredr_coprimer : forall a b, irredr a -> coprimer a b = ~~(a %| b).
proof: Proof. by move=> a b ia; rewrite irredr_dvd // negbK. Qed.
imports: HB(structures) Coq(ssreflect ssrfun ssrbool Arith.Wf_nat) mathcomp(eqtype ssrnat div seq path) mathcomp(ssralg fintype perm tuple choice generic_quotient) mathcomp(matrix bigop zmodp mxalgebra poly) stronglydiscrete