fact: Definition fibered_algebra_nat : fibered_alg nat_alg_z ≃ ∑ (X : ∏ n : ℕ, UU), (X 0) × (∏ n, X n → X (S n)).
imports: UniMath.Foundations.Preamble UniMath.Foundations.PartA UniMath.Foundations.PartD UniMath.Foundations.UnivalenceAxiom UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Categories.Type.Core UniMath.Induction.FunctorAlgebras_legacy UniMath.Induction.PolynomialFunctors UniMath.Induction.W.Core UniMath.Induction.W.Fibered