proposition: Lemma opp_isPushout {a b c d : C} (f : (C^op)⟦a, b⟧) (g : (C^op)⟦a, c⟧) (in1 : (C^op)⟦b, d⟧) (in2 : (C^op)⟦c, d⟧) (H : f · in1 = g · in2) (iPo : @isPushout (C^op) a b c d f g in1 in2 H) : @isPullback C a b c d f g in1 in2 H.
proof: Proof. exact iPo. Qed.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Monics UniMath.CategoryTheory.Epis UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Limits.Initial UniMath.CategoryTheory.Limits.Terminal UniMath.CategoryTheory.Limits.Zero UniMath.CategoryTheory.Limits.Equalizers UniMath.CategoryTheory.Limits.Coequalizers UniMath.CategoryTheory.Limits.Kernels UniMath.CategoryTheory.Limits.Cokernels UniMath.CategoryTheory.Limits.Pushouts UniMath.CategoryTheory.Limits.Pullbacks UniMath.CategoryTheory.Limits.BinProducts UniMath.CategoryTheory.Limits.BinCoproducts