fact: Definition weq_binprod_to_pullback : weq (some_binprod (C / Z)) (some_pullback C Z) := binprod_to_pullback ,, isweq_binprod_to_pullback.
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