Definition delta_functor_data (I : UU) (C : category) : functor_data C (power_category I C). Proof. use tpair. - intros x i; apply x. - intros x y f i; simpl; apply f. Defined.
Require Import UniMath.Foundations.PartD. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.opp_precat.