fact: Definition iso_is_opcartesian_sopfib {C₁ C₂ : category} (F : C₁ ⟶ C₂) {x₁ x₂ : C₁} (i : x₁ --> x₂) (Hi : is_z_isomorphism i) : is_opcartesian_sopfib F i.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Total UniMath.CategoryTheory.DisplayedCats.Fibrations