proposition: Lemma dvdmxBl (m0 m1 m2 : nat) (N K : 'M_(m2, m1)) (M : 'M[R]_(m0, m1)) : M %| N -> (M %| K - N) = (M %| K) :> bool.
proof: Proof. by move=> dvdMN; rewrite dvdmxDl // dvdmxN. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice matrix bigop zmodp mxalgebra poly) ssrcomplements dvdring stronglydiscrete