fact: Definition conjmx (m n : nat) (V : 'M_(m, n)) (f : 'M[F]_n) : 'M_m := V *m f *m pinvmx V.
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)