fact: Fixpoint SemVar `(v : Var Γ τ) : SemEnv Γ → SemTy τ := match v with | ZV => λ se, fst se | SV v => λ se, SemVar v (snd se) end.
imports: Category.Lib Category.Lib.IList Category.Instance.Lambda.Ty Category.Instance.Lambda.Exp Category.Instance.Lambda.Ren Category.Instance.Lambda.Sub Equations(Equations)