∀ {R : Type u_5} {E : Type u_6} {F : Type u_7} {G : Type u_8} {H : Type u_9} [inst : CommSemiring R]
  [inst_1 : StarRing R] [inst_2 : AddCommMonoid E] [inst_3 : StarAddMonoid E] [inst_4 : Module R E]
  [inst_5 : StarModule R E] [inst_6 : AddCommMonoid F] [inst_7 : StarAddMonoid F] [inst_8 : Module R F]
  [inst_9 : StarModule R F] [inst_10 : AddCommMonoid G] [inst_11 : StarAddMonoid G] [inst_12 : Module R G]
  [inst_13 : StarModule R G] [inst_14 : AddCommMonoid H] [inst_15 : StarAddMonoid H] [inst_16 : Module R H]
  [inst_17 : StarModule R H] (f : WithConv (E →ₗ[R] F)) (g : WithConv (G →ₗ[R] H)) (x : TensorProduct R E G),
  star ((TensorProduct.map f.ofConv g.ofConv) x) = (TensorProduct.map (star f).ofConv (star g).ofConv) (star x)