∀ {𝕜 : Type u} {E : Type wE} {F : Type wF} {ι : Type v} [inst : NontriviallyNormedField 𝕜]
  [inst_1 : SeminormedAddCommGroup E] [inst_2 : NormedSpace 𝕜 E] [inst_3 : SeminormedAddCommGroup F]
  [inst_4 : NormedSpace 𝕜 F] [inst_5 : Fintype ι] {f : E [⋀^ι]→L[𝕜] F},
  BddBelow {c | 0 ≤ c ∧ ∀ (m : ι → E), ‖f m‖ ≤ c * ∏ i, ‖m i‖}