fact: Definition zig_zag {C : category} (x y : C) : UU := ∑ (n : ℕ), zig_zag_of_length n x y.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Groupoids