∀ {E : Type u_1} [inst : NormedAddCommGroup E] [inst_1 : NormedSpace ℝ E] {𝕜 : Type u_3} {G : Type u_4}
  [inst_2 : NontriviallyNormedField 𝕜] [IsRCLikeNormedField 𝕜] [inst_4 : NormedSpace 𝕜 E]
  [inst_5 : NormedAddCommGroup G] [inst_6 : NormedSpace 𝕜 G] {f g : E → G} {s : Set E} {x : E},
  Convex ℝ s →
    DifferentiableOn 𝕜 f s →
      DifferentiableOn 𝕜 g s →
        UniqueDiffOn 𝕜 s → Set.EqOn (fderivWithin 𝕜 f s) (fderivWithin 𝕜 g s) s → x ∈ s → f x = g x → Set.EqOn f g s