fact: Definition app' (L : lambda_theory_data) : (L 2 : hSet) := app (pr (n := 1) (● 0)%stn).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.Tuples UniMath.AlgebraicTheories.AlgebraicTheories UniMath.AlgebraicTheories.LambdaTheoryCategoryCore