fact: Definition pb_disc_sopfib_mor {x : B} {f g : hom x s} (α : f --> g) : disc_sopfib_slice HB x ⟦ pr1 (pb _ f) , pr1 (pb _ g) ⟧.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Unitors UniMath.Bicategories.Core.BicategoryLaws UniMath.Bicategories.Core.Univalence UniMath.Bicategories.Core.Discreteness UniMath.Bicategories.Core.TransportLaws UniMath.Bicategories.Morphisms.FullyFaithful UniMath.Bicategories.Morphisms.InternalStreetFibration UniMath.Bicategories.Morphisms.InternalStreetOpFibration UniMath.Bicategories.Morphisms.DiscreteMorphisms UniMath.Bicategories.Morphisms.Properties.ClosedUnderPullback UniMath.Bicategories.DisplayedBicats.Examples.DisplayMapBicatSlice UniMath.Bicategories.Logic.DisplayMapBicat UniMath.Bicategories.Limits.Pullbacks UniMath.Bicategories.Limits.PullbackFunctions