fact: Definition und_ver_precategory (C: predoublecategory_hor_sq) : precategory := make_precategory (und_ver_cat_precategory_data C) (und_ver_cat_is_precategory C).
imports: UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Notations UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence