∀ {𝕜 : Type u_2} [inst : NontriviallyNormedField 𝕜] {E : Type u_3} {F : Type u_4} {G : Type u_5}
  [inst_1 : NormedAddCommGroup E] [inst_2 : NormedSpace 𝕜 E] [inst_3 : NormedAddCommGroup F] [inst_4 : NormedSpace 𝕜 F]
  [inst_5 : NormedAddCommGroup G] [inst_6 : NormedSpace 𝕜 G] {u : E →L[𝕜] F} {f : F → G}
  {pf : FormalMultilinearSeries 𝕜 F G} {x : E} {r : ENNReal},
  HasFPowerSeriesOnBall f pf (u x) r → HasFPowerSeriesOnBall (f ∘ ⇑u) (pf.compContinuousLinearMap u) x (r / ‖u‖ₑ)