∀ {α : Type u_1} {β : Type u_2} {ι : Type u_4} [inst : TopologicalSpace α] [inst_1 : UniformSpace β] {F : ι → α → β}
  {f : α → β} {s : Set α} {p : Filter ι},
  IsOpen s →
    (TendstoLocallyUniformlyOn F f p s ↔
      ∀ x ∈ s, Filter.Tendsto (fun y => (f y.2, F y.1 y.2)) (p ×ˢ nhds x) (uniformity β))