OAI/GroupTheory/PolycyclicRecognition/Algebra/SequenceSubexponentialRate.lean

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A common vanishing rate for subexponential coordinate bounds

  1. theorem OAI.PolycyclicRecognition.exists_sequence_subexponential_rate line 16

    Source documentation

    A subexponential upper bound can be expressed by one nonnegative vanishing exponential rate, including every initial scale.

    theorem exists_sequence_subexponential_rate
        (scale R : ℕ → ℝ) (hs : ∀ n, 0 < scale n)
        (hR : HasSubexponentialUpperBoundSeq scale R) :
        ∃ ε : ℕ → ℝ, (∀ n, 0 ≤ ε n) ∧ Tendsto ε atTop (𝓝 0) ∧
          ∀ n, R n ≤ Real.exp (scale n * ε n) := by
    …

    Mentions: OAI.PolycyclicRecognition.HasSubexponentialUpperBoundSeq