fact: Fixpoint ScS {Γ Γ' Γ''} (s : Sub Γ' Γ'') (δ : Sub Γ Γ') : Sub Γ Γ'' := match s with | NoSub => NoSub | Push e σ => Push (SubExp δ e) (ScS σ δ) end.
imports: Coq.Lists.List Category.Lib Category.Instance.Lambda.Exp Category.Instance.Lambda.Value Category.Instance.Lambda.Ren Equations(Equations)