fact: Definition bareiss_char_poly n (M : 'M_(1 + n, 1 + n)) : {poly R} := bareiss (char_poly_mx M).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path ssralg) mathcomp(fintype perm choice matrix bigop zmodp poly polydiv mxpoly) CoqEAL(ssrcomplements minor dvdring) polydvd