arXiv:2608.14607v1

Quantitative Time-Averaged Spherical Means Along Equidistributed Spirals: Diophantine Rates and Optimality

Claudio Fragomeli

math.DS37A4511K6011J83

Abstract

We study quantitative time averages of spherical observables sampled along equidistributed spirals generated by Kronecker flows. For a Diophantine frequency vector and Holder observables on the sphere, we prove a window-uniform polynomial convergence rate toward the spherical mean. The main difficulty is that the natural measure-preserving parametrization of the sphere is not continuous on the torus and has polar degeneracies; we handle this through a localization and de la Vallee Poussin approximation scheme. We then apply the estimate to shrinking spirals converging to a center, obtaining explicit rates for spherical means under mild radial regularity. We also treat integrable angular data and homogeneous singularities at the center, proving a dichotomy between power-law and exponentially shrinking radial profiles. Finally, we show that no uniform rate can hold over all rationally independent frequencies, even for smooth mean-zero data on the sphere.

AI-generated audit

Audit summary

Audited against arXiv v1

Not a correctness certificate. A “Correct” result may include yellow typos or minor formal corrections that do not affect substantive soundness. It means this audit found no unresolved substantive error under the stated criteria; it does not replace expert scrutiny or formal verification.

Current report

Detailed mathematical audit

Generated August 18, 2026
01Statements2 reported findingsCorrect

The quantitative spherical-mean rates along Diophantine spirals, their extensions to rough or singular data, and the matching optimality construction are correct under the stated regularity and Diophantine assumptions.

Theorems 4.1, 5.1, and 7.1Correct

The cutoff and Diophantine exponents are balanced correctly

Pages 9–20 · Theorems 4.1, 5.1, and 7.1 · arXiv:2608.14607v1

Removing polar caps of size η\eta creates an O(η)O(\eta) occupation error, while localization gives a Hölder cost O(ηs)O(\eta^{-s}). Fourier truncation and the Diophantine lower bound give the announced time-average estimate; optimizing the truncation at K=T1/(τ+d)K=T^{1/(\tau+d)} and then η=Ts/((1+s)(τ+d))\eta=T^{-s/((1+s)(\tau+d))} yields exactly the rate in Theorem 4.1. The spiral reparametrization preserves this balance, and the resonant Fourier construction in Section 7 attains the asserted obstruction scale.

Full paper, version 1
Theorems 5.1, 6.1, and 7.1Correct

Spiral means, integrable data, and optimality are mutually consistent

Sections 5–7 · arXiv:2608.14607v1

The block decomposition gives the claimed quantitative rate for smooth angular data, while truncation and maximal control yield qualitative convergence for integrable data. The sphere construction in Theorem 7.1 rules out a universal rate in the broader class without contradicting either positive result.

02Proofs2 reported findingsCorrect

The geometric parametrization, cutoff, Fourier, Diophantine, and optimality arguments are correct and complete.

Sections 3–7Correct and complete

All approximation errors are uniform at the selected scales

Pages 6–22 · Sections 3–7 · arXiv:2608.14607v1

The corrected spherical parametrization has the stated invariant density, boundary singularities are isolated by the cap cutoff, and Fourier coefficients are summed in a range where the small-divisor bound applies. The proof keeps the dependence on the Hölder exponent, dimension, and Diophantine type through both optimizations. The lower-bound example uses disjoint resonant blocks, so later blocks do not cancel the selected contribution.

Sections 4–7Correct and complete

Fourier control, radial blocking, and the counterexample are closed separately

Pages 14–35 · arXiv:2608.14607v1

The corrected Lipschitz bound for the spherical parametrization is combined with the Diophantine lower bound for every nonzero Fourier mode and optimized uniformly over windows. Subsequent radial blocks control radius variation before applying equidistribution; the optimality packets are disjoint and summable, so later scales preserve the selected lower bounds.

03Novelty0 reported findingsNo non-novelty findings

No non-novelty findings.

Detailed audit reportFull reasoning, manuscript locations, and references.
Open report PDF ↗

Author response

Challenge an audit finding

Local workflow preview

A listed author may submit formal evidence that an audit is inaccurate. The response would be considered in a fresh AI re-evaluation; it would not edit the audit automatically.

Paper
arXiv:2608.14607v1
Authors listed
Claudio Fragomeli
Audit date
August 18, 2026
  1. 01Establish identityMatch an authenticated scholarly identity to this paper.
  2. 02Submit evidenceIdentify the finding and give a formal mathematical response.
  3. 03Re-evaluateA separate agent checks the response and records a disposition.
Recommended production method

Authenticate with ORCID, then require an exact arXiv match

MathAudit should accept the identity only when ORCID OAuth authenticates the claimant's iD and this exact arXiv paper appears in arXiv's public authority feed for that iD. A matching name alone is not sufficient.

ORCID OAuth and arXiv authority-record lookup are not connected in this local prototype.

Email fallback for papers without a linked ORCID

A production fallback could send a one-time link only when the submitted address matches an independently maintained author-contact allowlist for this paper. MathAudit must return the same message for every address so the form cannot reveal which contacts are on that list.

This demonstration does not send, store, or compare the address.

Structured response preview

This form remains unavailable until production identity verification succeeds. Nothing entered here is submitted.

This panel never establishes authorship in the local prototype. A production result should be described narrowly as an authenticated ORCID match or control of a separately allowlisted author-contact mailbox.