fact: Definition bdet n (M : 'M_(1 + n, 1 + n)) : R := (bareiss_char_poly (- M))`_0.
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