proposition: Lemma divzMr p m d : p != 0 -> (d %| m -> m * p %/ (d * p) = m %/ d)%Z.
proof: Proof. by rewrite -!(mulrC p); apply: divzMl. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop prime order) mathcomp(ssralg poly ssrnum ssrint archimedean rat matrix) mathcomp(polydiv perm zmodp mxalgebra vector)