fact: Definition coslicecat_mor (f g : coslicecat_ob) := ∑ h, pr2 f · h = pr2 g.
imports: UniMath.Foundations.PartA UniMath.Foundations.PartD UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Total