proposition: Lemma kermx0 m n : (kermx (0 : 'M_(m, n)) :=: 1%:M)%MS.
proof: Proof. by apply/eqmxP; rewrite submx1/= sub_kermx mulmx0. 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 finalg zmodp matrix)