∀ {R : Type u_3} {E : Type u_1} {F : Type u_2} [inst : Semiring R] [inst_1 : InvolutiveStar R]
  [inst_2 : AddCommMonoid E] [inst_3 : Module R E] [inst_4 : StarAddMonoid E] [inst_5 : StarModule R E]
  [inst_6 : AddCommMonoid F] [inst_7 : Module R F] [inst_8 : StarAddMonoid F] [inst_9 : StarModule R F]
  [inst_10 : TopologicalSpace E] [inst_11 : TopologicalSpace F] [inst_12 : ContinuousStar E]
  [inst_13 : ContinuousStar F] [inst_14 : ContinuousAdd F] (x y : WithConv (E →L[R] F)), star (x + y) = star x + star y