∀ {R : Type u_2} {M : Type u_4} [inst : Semiring R] [inst_1 : PartialOrder R] [inst_2 : AddCommMonoid M]
  [inst_3 : SMul R M] {x : M} {ι : Sort u_7} {f : ι → ConvexCone R M}, x ∈ iInf f ↔ ∀ (i : ι), x ∈ f i