fact: Definition unit_double_cat_are_conjoints {C : double_cat} {x y : C} {h : y -->h x} {v : x -->v y} (c : double_cat_are_conjoints h v) : square v (identity_v x) (identity_h x) h := pr1 c.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.Bicategories.Core.Bicat UniMath.Bicategories.DoubleCategories.Basics.DoubleCategoryBasics UniMath.Bicategories.DoubleCategories.Core.DoubleCats UniMath.Bicategories.DoubleCategories.DerivedLaws.TransportLaws UniMath.Bicategories.DoubleCategories.Underlying.HorizontalBicategory