fact: Definition is_Coalgebra_mor {X Y : Coalgebra} (f : X --> Y) : UU := f · Coalg_map Y = Coalg_map X · #T f.
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