fact: Definition Coalgebra_mor_eq {X Y : Coalgebra T} {f g : Coalgebra_mor T X Y} : (f : X --> Y) = g ≃ f = g.
imports: UniMath.Foundations.PartD UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.whiskering UniMath.CategoryTheory.Adjunctions.Core UniMath.CategoryTheory.Monads.Comonads