proposition: Lemma eqd_mulr b a c : a %= b -> a * c %= b * c.
proof: Proof. by move/eqd_mul; apply. 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