OAI/Combinatorics/MatrixRemoval/Asymptotics.lean

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Analytic conclusion of the ordered-matrix construction. The polynomial/geometric comparison uses tendsto_pow_const_div_const_pow_of_one_lt.

  1. theorem OAI.Problem348.exists_depth_polynomial_decay line 20

    Source documentation

    Exponential decay beats the inverse-polynomial distance parameter.

    theorem exists_depth_polynomial_decay (c C : ℝ) (hc : 0 < c) :
        ∃ h : ℕ, 1 ≤ h ∧
          (1 / ((386 * (h : ℝ) + 2) ^ 2)) * (1 / ((2 : ℝ) ^ h)) <
            c * Real.rpow (1 / ((386 * (h : ℝ) + 2) ^ 2)) C := by
    …