fact: Definition h_sq_isotoid_2_1 {B : verity_double_bicat} (H : horizontally_saturated B) (HB_2_1 : hor_locally_univalent B) {x y : B} {h₁ h₂ : x --> y} (τ : invertible_horizontal_square h₁ h₂) : h₁ = h₂ := isotoid_2_1 HB_2_1 (horizontal_square_to_invertible_2cell H τ).
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.Univalence UniMath.Bicategories.DoubleCategories.DoubleBicat.VerityDoubleBicat UniMath.Bicategories.DoubleCategories.DoubleBicat.DerivedLaws UniMath.Bicategories.DoubleCategories.DoubleBicat.UnderlyingCats UniMath.Bicategories.DoubleCategories.DoubleBicat.CellsAndSquares