Definition isaprop_mor_preserves_opcartesian {B : bicat} {e₁ b₁ : B} (p₁ : e₁ --> b₁) {e₂ b₂ : B} (p₂ : e₂ --> b₂) (fe : e₁ --> e₂) : isaprop (mor_preserves_opcartesian p₁ p₂ fe).
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.Examples.OpCellBicat. Require Import UniMath.Bicategories.Core.Univalence. Require Import UniMath.Bicategories.Core.UnivalenceOp. Require Import UniMath.Bicategories.Morphisms.InternalStreetFibration.