fact: Definition isPullback_in_product_category {w x y z : category_binproduct C₁ C₂} {f : x --> z} {g : y --> z} (π₁ : w --> x) (π₂ : w --> y) (p : π₁ · f = π₂ · g) (H₁ : isPullback (maponpaths pr1 p)) (H₂ : isPullback (maponpaths dirprod_pr2 p)) : isPullback p.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.PrecategoryBinProduct UniMath.CategoryTheory.Limits.Terminal UniMath.CategoryTheory.Limits.BinProducts UniMath.CategoryTheory.Limits.Pullbacks UniMath.CategoryTheory.Limits.Initial UniMath.CategoryTheory.Limits.BinCoproducts UniMath.CategoryTheory.Limits.Preservation