Definition is_cartesian_2cell_sfib_postcomp_factor : k ==> f. Proof. use (is_cartesian_2cell_sfib_factor _ Hγ (δ • β) δp). abstract (rewrite <- rwhisker_vcomp ; rewrite r ; rewrite !vassocl ; rewrite rwhisker_vcomp ; rewrite q ; apply idpath). Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.DisplayedCats.StreetFibration. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.Univalence.