no goals
ι : Type ?u.229995
ι' : Type ?u.229998
α : Type u_1
β : Type u_2
γ : Type ?u.230007
inst✝ : LinearOrderedField α
l : Filter β
f : β → α
r : α
hr : r < 0
⊢ Tendsto (fun x => f x * r) l atTop ↔ Tendsto f l atBot
simpa only [mul_comm] using tendsto_const_mul_atTop_of_neg hr