proposition: Lemma eigenvalue_poly n a (f : 'M_n) : eigenvalue f a = eigenpoly f ('X - a%:P).
proof: Proof. by rewrite /eigenpoly /eigenvalue eigenspace_poly. Qed.
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)