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Theorems · Theorem · complex analysis

FormalMultilinearSeries.ofScalars_radius_eq_zero_of_tendsto

∀ {𝕜 : Type u_1} (E : Type u_2) [inst : NontriviallyNormedField 𝕜] [inst_1 : NormedRing E] [inst_2 : NormedAlgebra 𝕜 E]
  (c : ℕ → 𝕜) [NormOneClass E],
  Filter.Tendsto (fun n => ‖c n.succ‖ / ‖c n‖) Filter.atTop Filter.atTop →
    (FormalMultilinearSeries.ofScalars E c).radius = 0

If ‖c n.succ‖ / ‖c n‖ is unbounded, then the radius of convergence is zero.

Defined in
Mathlib.Analysis.Analytic.OfScalars
Cited by
1 results in Mathlib
Foundations
Depth 173 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NontriviallyNormedFieldNormedRingNormedAlgebraNormOneClass

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