proposition: Proposition isaset_iso_twosided_disp {C₁ C₂ : category} {D : twosided_disp_cat C₁ C₂} {x₁ x₂ : C₁} {y₁ y₂ : C₂} (f : z_iso x₁ x₂) (g : z_iso y₁ y₂) (xy₁ : D x₁ y₁) (xy₂ : D x₂ y₂) : isaset (iso_twosided_disp f g xy₁ xy₂).
proof: Proof. use isaset_total2. - apply isaset_disp_mor. - intro. apply isasetaprop. apply isaprop_is_iso_twosided_disp. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat