proposition: Lemma eqd_mul2r c a b : c != 0 -> (a * c %= b * c) = (a %= b).
proof: Proof. by move=> c0; rewrite eqd_def !dvdr_mul2r. 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