proposition: Lemma dvdr_mulr_l b a : b != 0 -> (a * b %| b) = (a %= 1).
proof: Proof. by move=> b0; rewrite -{2}[b]mul1r dvdr_mul2r ?dvdr1. 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