no goals
α : Type u_2
β : Type u_1
l : Filter α
k f g g' : α → β
inst✝² : TopologicalSpace β
inst✝¹ : Field β
inst✝ : ContinuousMul β
c : β
hc0 : c ≠ 0
h : SuperpolynomialDecay l k fun n => f n * c
x : α
⊢ f x * c * c⁻¹ = f x
simp [mul_assoc, mul_inv_cancel hc0]