fact: Definition simmx_to_for {F : fieldType} {m n} (P : 'M_(m, n)) A (S : {pred 'M[F]_m}) := S (conjmx P A).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(div fintype tuple finfun bigop fingroup perm) mathcomp(ssralg zmodp matrix mxalgebra poly polydiv)