OAI/Geometry/RCD/Coordinates/DyadicCenterDecay.lean

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Vanishing of affine center values at shrinking radial scales

  1. theorem OAI.RegularPointCoordinates.dyadic_affine_center_tendsto_zero line 16

    Source documentation

    The actual dyadic radius decays faster than the proved covector growth. Thus the size estimate for affine fit centers forces a zero limit.

    theorem dyadic_affine_center_tendsto_zero {n : ℕ} {r0 M : ℝ}
        (hr0 : 0 ≤ r0) (hM : 0 ≤ M)
        (F : ℕ → Euclidean n ≃L[ℝ] Euclidean n) (b : Euclidean n)
        (hgrowth : ∀ i, ‖(F i).symm b‖ ≤ (9 / 8 : ℝ) ^ i * ‖(F 0).symm b‖)
        (c : ℕ → ℝ)
        (hsize : ∀ i, |c i| ≤ M * (distanceSourceRadius r0 i / 64) * ‖(F i).symm b‖) :
        Tendsto c atTop (𝓝 0) := by
    …

    Mentions: OAI.RegularPointCoordinates.Euclidean, OAI.RegularPointCoordinates.distanceSourceRadius