simp [h]
case neg
ι : Type u_1
inst✝⁴ : Fintype ι
inst✝³ : DecidableEq ι
𝕜 : Type u_2
inst✝² : NontriviallyNormedField 𝕜
F : Type u_3
inst✝¹ : NormedAddCommGroup F
inst✝ : NormedSpace 𝕜 F
i : ι
f : (ι → 𝕜) → F
f' : (ι → 𝕜) →L[𝕜] F
x : ι → 𝕜
hf : HasFDerivAt f f' x
this :
  HasFDerivAt (f ∘ Function.update x i)
    (ContinuousLinearMap.comp f' (ContinuousLinearMap.pi (Pi.single i (ContinuousLinearMap.id 𝕜 𝕜)))) (x i)
j : ι
h : ¬j = i
⊢ (Pi.single i (ContinuousLinearMap.id 𝕜 𝕜) j) 1 = Pi.single i 1 j
no goals