fact: Definition three_mor_eq'' {C : category} {x y : three C} {f g : x --> y} (Hb: pr1 f = pr1 g) (H11: three_mor11 f = three_mor11 g) : f = g.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.PrecategoryBinProduct UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Total UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.DisplayedCats.Examples.Arrow