fact: Definition make_parallell_diagram {C : category} (X : UU) (x y : C) (f : ∏ (t : X), x --> y) : diagram (parallell_graph X) C.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.FiniteSets