proposition: Lemma eqd_mul2l c a b : c != 0 -> (c * a %= c * b) = (a %= b).
proof: Proof. by move=> c0; rewrite eqd_def !dvdr_mul2l. 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