proposition: Proposition struct_cospan_sqr_mor_left {a₁ a₂ b₁ b₂ : A} {f : a₁ --> a₂} {g : b₁ --> b₂} {s₁ : struct_cospan a₁ b₁} {s₂ : struct_cospan a₂ b₂} (sq : struct_cospan_sqr f g s₁ s₂) : mor_left_of_struct_cospan s₁ · struct_cospan_sqr_ob_mor sq = #L f · mor_left_of_struct_cospan s₂.
proof: Proof. exact (pr12 sq). Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.Core.Setcategories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Constructions UniMath.CategoryTheory.DisplayedCats.Isos UniMath.CategoryTheory.DisplayedCats.Univalence UniMath.CategoryTheory.Limits.Pushouts UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.DisplayedFunctor UniMath.CategoryTheory.TwoSidedDisplayedCats.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence UniMath.CategoryTheory.TwoSidedDisplayedCats.Total UniMath.CategoryTheory.TwoSidedDisplayedCats.Strictness UniMath.CategoryTheory.TwoSidedDisplayedCats.Examples.Constant UniMath.CategoryTheory.TwoSidedDisplayedCats.Examples.DispCatOnTwoSidedDispCat