Definition lax_slice_is_opcartesian_2cell {c₁ c₂ : B} {s₁ s₂ : c₁ --> c₂} {α : s₁ ==> s₂} {t₁ : lax_slice_disp_bicat B a c₁} {t₂ : lax_slice_disp_bicat B a c₂} {ss₁ : t₁ -->[ s₁ ] t₂} {ss₂ : t₁ -->[ s₂ ] t₂} (αα : ss₁ ==>[ α ] ss₂) : is_opcartesian_2cell (lax_slice_disp_bicat B a) αα.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Univalence. Require Import UniMath.CategoryTheory.whiskering. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.Univalence. Require Import UniMath.Bicategories.Core.BicategoryLaws. Require Import UniMath.Bicategories.Core.Unitors. Require Import UniMath.Bicategories.Core.EquivToAdjequiv. Require Import UniMath.CategoryTheory.DisplayedCats.Core. Require Import UniMath.Bicategories.DisplayedBicats.DispBicat. Import DispBicat.Notations. Require Import UniMath.Bicategories.DisplayedBicats.DispInvertibles. Require Import UniMath.Bicategories.DisplayedBicats.CleavingOfBicat. Require Import UniMath.Bicategories.DisplayedBicats.Examples.LaxSlice. Require Import UniMath.Bicategories.DisplayedBicats.Examples.Slice.