proposition: Lemma multistep_Pair1 {Γ τ1 τ2} {e1 e1' : Γ ⊢ τ1} {e2 : Γ ⊢ τ2} : (e1 --->* e1') → Pair e1 e2 --->* Pair e1' e2.
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)