∀ {K : Type u_1} [inst : Field K] [inst_1 : NumberField K] {x : NumberField.mixedEmbedding.mixedSpace K} {c : ℝ},
  x ∈ NumberField.mixedEmbedding.fundamentalCone K → c ≠ 0 → c • x ∈ NumberField.mixedEmbedding.fundamentalCone K