∀ {α : Type u_1} [inst : UniformSpace α] [inst_1 : AddGroup α] [IsUniformAddGroup α] {ι : Type u_3} {X : Type u_4}
  [inst_3 : TopologicalSpace X] {F G : ι → X → α} {f g : X → α} {l : Filter ι},
  TendstoLocallyUniformly F f l →
    TendstoLocallyUniformly G g l → TendstoLocallyUniformly (fun i i_1 => F i i_1 - G i i_1) (fun i => f i - g i) l