proposition: Lemma divzMpr p m d : p > 0 -> (m * p %/ (d * p) = m %/ d)%Z.
proof: Proof. by move=> p_gt0; rewrite -!(mulrC p) divzMpl. 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)