proposition: Proposition isaprop_invertible_vertical_square_laws {x y : B} {v₁ v₂ : x -|-> y} (s : invertible_vertical_square_data v₁ v₂) : isaprop (invertible_vertical_square_laws s).
proof: Proof. apply isapropdirprod ; apply isaset_square_double_bicat. Qed.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence UniMath.CategoryTheory.TwoSidedDisplayedCats.Discrete UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Unitors UniMath.Bicategories.DoubleCategories.DoubleBicat.VerityDoubleBicat UniMath.Bicategories.DoubleCategories.DoubleBicat.DerivedLaws