∀ {α : Type u_1} {β : Type u_2} [inst : Field α] [inst_1 : LinearOrder α] [IsStrictOrderedRing α] {l : Filter β}
  {f : β → α} {r : α}, r < 0 → (Filter.Tendsto (fun x => f x / r) l Filter.atBot ↔ Filter.Tendsto f l Filter.atTop)