fact: Definition ver_left_unitor { C:predoublecategory_sq_hor_ver_data} {a b: C} (f: a -v-> b) : UU := sqq_iso_special (ver_identity a ·v f) f.
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