proposition: Lemma has_homsets_graph : has_homsets cgraph_precategory_ob_mor.
proof: Proof. intros G H. apply isaset_cgraph_mor. - exact (isaset_node H). - exact (isaset_arc H). Defined.
imports: UniMath.Foundations.PartA UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Categories.HSET.Core UniMath.Combinatorics.CGraph