fact: Definition isweq_binprod_to_pullback : isweq binprod_to_pullback := isweq_iso _ _ binprod_to_pullback_inv pullback_to_binprod_inv.
imports: UniMath.MoreFoundations.Tactics UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.slicecat UniMath.CategoryTheory.Equivalences.Core UniMath.CategoryTheory.Limits.BinProducts UniMath.CategoryTheory.Limits.Pullbacks