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Theorems · Theorem · complex analysis

FormalMultilinearSeries.radius_inv_eq_limsup

∀ {𝕜 : Type u_1} [inst : NontriviallyNormedField 𝕜] {E : Type u_2} [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] {F : Type u_3} [inst_3 : NormedAddCommGroup F] [inst_4 : NormedSpace 𝕜 F]
  (p : FormalMultilinearSeries 𝕜 E F), p.radius⁻¹ = Filter.limsup (fun n => ↑(‖p n‖₊ ^ (1 / ↑n))) Filter.atTop

The Cauchy-Hadamard theorem for formal multilinear series: The inverse of the radius is equal to $\limsup_{n\to\infty} \sqrt[n]{‖p n‖}$.

Defined in
Mathlib.Analysis.Analytic.RadiusLiminf
Cited by
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Foundations
Depth 202 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NontriviallyNormedFieldNormedAddCommGroupNormedSpaceNormedAddCommGroupNormedSpace

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