∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Limits.HasProducts C] {X : TopCat}
  (F : TopCat.Presheaf C X) {ι : Type v'} (U : ι → TopologicalSpace.Opens ↑X),
  (TopCat.Presheaf.SheafConditionEqualizerProducts.fork F U).π.app CategoryTheory.Limits.WalkingParallelPair.zero =
    TopCat.Presheaf.SheafConditionEqualizerProducts.res F U