∀ {𝕜 : Type u_1} {E : Type u_3} [inst : Ring 𝕜] [inst_1 : PartialOrder 𝕜] [inst_2 : TopologicalSpace E]
  [inst_3 : AddCommGroup E] [inst_4 : Module 𝕜 E] {s : Set E} {x : E} [AddRightStrictMono 𝕜],
  StrictConvex 𝕜 s → 0 ∈ s → x ∈ s → x ≠ 0 → ∀ {t : 𝕜}, 0 < t → t < 1 → t • x ∈ interior s