∀ {𝕜 : Type u_1} {E : Type u_2} {β : Type u_5} [inst : Field 𝕜] [inst_1 : LinearOrder 𝕜] [IsStrictOrderedRing 𝕜]
  [inst_3 : AddCommMonoid β] [inst_4 : PartialOrder β] [IsOrderedAddMonoid β] [inst_6 : AddCommMonoid E]
  [inst_7 : SMul 𝕜 E] [inst_8 : Module 𝕜 β] [PosSMulMono 𝕜 β] {f : E → β} {s : Set E} {x y : E},
  StrictConvexOn 𝕜 s f → IsMinOn f s x → IsMinOn f s y → x ∈ s → y ∈ s → x = y