Definition slice_to_PreShv_mor {X Y : PreShv C / P} (F : X --> Y) : slice_to_PreShv_ob X --> slice_to_PreShv_ob Y := slice_to_PreShv_ob_nat F ,, slice_to_PreShv_ob_is_nat F.
Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.FunctorCategory. Require Import