∀ {M : Type u_1} [inst : AddCommGroup M] [inst_1 : LinearOrder M] [inst_2 : IsOrderedAddMonoid M] (K : Type u_2)
  [inst_3 : Ring K] [inst_4 : LinearOrder K] [inst_5 : IsOrderedRing K] [inst_6 : Archimedean K] [inst_7 : Module K M]
  [inst_8 : PosSMulMono K M] (c c_1 : ArchimedeanClass M),
  c = c_1 → ArchimedeanClass.ball K c = ArchimedeanClass.ball K c_1