fact: Definition unitmxEE := (unitmx_mul, unitmx_tr, unit_Bezout_mx, unitmx_perm).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg ssrint ssrnum fintype choice) mathcomp(matrix mxalgebra bigop zmodp perm) dvdring mxstructure stronglydiscrete coherent edr