proposition: Lemma detM n' (A B : 'M[R]_n'.+1) : \det (A * B) = \det A * \det B.
proof: Proof. exact: det_mulmx. 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)