OAI/Geometry/RCD/Harmonic/UniformSharpProjection.lean

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A single sharp-projection constant and Euclidean threshold

  1. theorem OAI.RegularPointCoordinates.SharpProjectionFamily.uniform_bound line 19

    Source documentation

    The collected Poisson and projection estimates imply one constant and one threshold, uniformly over the center, dyadic scale and configuration. The proof constructs the countersequence rather than assuming compactness for a normalized projection residual.

    theorem SharpProjectionFamily.uniform_bound {K : ℝ} {n : ℕ} {hX : NoncollapsedRCD K n X}
        {I : Type*} {S ρ : ℝ} (d : SharpProjectionFamily hX I S ρ)
        (hcompact : LocalPoissonHarmonicCompactnessInput hX)
        (hgradient : LocalHarmonicL2GradientInput hX) (hn : 2 ≤ n)
        (hS : 0 < S) (hρ : 0 < ρ) (hρS : ρ < S) :
        ∃ C : ℝ, 0 < C ∧ ∃ δ : ℝ, 0 < δ ∧
          ∀ i, d.error i < δ → d.size i ≤ C * d.source i := by
    …

    Mentions: OAI.RegularPointCoordinates.NoncollapsedRCD, OAI.RegularPointCoordinates.SharpProjectionFamily, OAI.RegularPointCoordinates.LocalPoissonHarmonicCompactnessInput, OAI.RegularPointCoordinates.LocalHarmonicL2GradientInput