fact: Definition bareiss n (M : 'M_(1 + n, 1 + n)) : {poly R} := bareiss_rec 1 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