refine TendstoLocallyUniformlyOn.deriv ?_ eventually_mem_nhdsWithin hU
U : Set ℂ
Q : Set ℂ → Set ℂ
ι : Type u_1
l : Filter ι
hU : IsOpen U
f : 𝓒 U
⊢ TendstoLocallyUniformlyOn uderiv (uderiv f) (𝓝[𝓗 U] f) U
U : Set ℂ
Q : Set ℂ → Set ℂ
ι : Type u_1
l : Filter ι
hU : IsOpen U
f : 𝓒 U
⊢ TendstoLocallyUniformlyOn (fun f => f) f (𝓝[𝓗 U] f) U