proposition: Lemma multistep_Snd1 {Γ τ1 τ2} {p p' : Γ ⊢ (τ1 × τ2)} : (p --->* p') → Snd p --->* Snd p'.
proof: Proof. now simpl_multistep. Qed.
imports: Category.Lib Category.Instance.Lambda.Ltac Category.Instance.Lambda.Ty Category.Instance.Lambda.Exp Category.Instance.Lambda.Value Category.Instance.Lambda.Ren Category.Instance.Lambda.Sub Category.Instance.Lambda.Sem Category.Instance.Lambda.Step Equations(Equations)