proposition: Lemma head_no_round : forall h, ~ round head h.
proof: Proof. intros h H; destruct H as [i Hi]. now apply (head_no_round_n i h). Qed.
imports: Coq(Arith Lia List Relation_Operators Operators_Properties Peano_dec Wellfounded.Inverse_Image Wellfounded.Inclusion) hydras(More_Arith Epsilon0 Hessenberg Simple_LexProd MoreLibHyps)