proposition: Lemma krull1_smithP m n (M : 'M[R]_(m,n)) : smith_spec M (krull1_smith M).
proof: Proof. by apply: gdco_smithP=> a b; apply: krull1_gdcoP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype matrix mxalgebra bigop zmodp perm choice) dvdring mxstructure minor stronglydiscrete coherent edr