proposition: Lemma mxsub_ffunr m' n' f g : @mxsub m' n' f (finfun g) =1 mxsub f g.
proof: Proof. by apply: eq_mxsub => // i; rewrite ffunE. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype finfun bigop finset fingroup perm order) mathcomp(div prime binomial ssralg countalg finalg zmodp)