arXiv:2607.25773v2

Orbital counting for relatively Anosov groups

Richard Canary, Tengren Zhang, Feng Zhu, Andrew Zimmer

math.DSmath.DGmath.MG37A1737A4022E40

Abstract

We obtain orbital counting results for relatively Anosov groups with respect to linear functionals with finite critical exponent. Our counting results follow from an equidistribution result and rely crucially on previous equidistribution results obtained in our proof of counting results for periods. Our results generalize earlier work of Sambarino in the setting of Anosov groups.

AI-generated audit

Audit summary

Audited against arXiv v2

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 orbital-counting and equidistribution theorems for relatively Anosov groups are correct. Two defects in the proof of the diagonal-mass estimate have explicit repairs and do not change the theorem statements.

Theorem 3.1Correct

The orbital measures equidistribute

Pages 5–18 · Theorem 3.1 · arXiv:2607.25773v2

The earlier equidistribution theorem for the flow boxes supplies the asymptotic away from the nontransverse locus. Proposition 3.5 transfers this result from Jordan projections to Cartan projections. Proposition 3.6, after the local repairs recorded under Proofs, controls the mass accumulating near the diagonal. The finite product-neighborhood decomposition and regular approximation of continuous test functions then yield the asserted weak-star convergence.

Theorems 1.1 and 1.2Correct

The counting and endpoint-pair distribution conclusions follow

Pages 2–3 and 18–19 · Theorems 1.1, 1.2 and proof of Theorem 3.1 · arXiv:2607.25773v2

Testing Theorem 3.1 against the constant function gives the claimed exponential orbital count with the stated normalization. Testing against product functions on the transverse boundary pair gives the endpoint equidistribution. The divergence-type and finite Bowen–Margulis–Sullivan measure hypotheses are exactly those used by the underlying equidistribution input.

02Proofs3 reported findingsContains incorrect or incomplete proofs

The main proof is repairable and the resulting theorems are correct, but two steps in the printed proof of Proposition 3.6 are not valid as written: Lemma 3.7 needs a closure hypothesis, and the zero-measure case needs continuous majorants with arbitrarily small integral rather than the zero function.

Lemma 3.7Minor formal correction

The coarse-invariance lemma needs relative compactness

Page 13 · Lemma 3.7 · arXiv:2607.25773v2

The proof takes a convergent sequence in the open set UU and says that its limit lies in UU, which is not true for an arbitrary inclusion UVU\subset V. Replace the hypothesis by UV\overline U\subset V. This is precisely the situation in the application: the neighborhoods were chosen with UnVn\overline{U_n}\subset V_n. With that local correction, compactness and continuity give the claimed eventual inclusion uniformly on the relevant compact set.

Proposition 3.6Incomplete as written; verified repair

The zero-measure compact sets are not dominated by the chosen functions

Pages 13–15 · proof of Proposition 3.6 · arXiv:2607.25773v2

For a compact set Kn=Vn×ηinVnK_n=\overline{V_n}\times\eta_{i_n}\overline{V_n} of positive product measure, the proof chooses a continuous majorant fn1f_n\geq1 on KnK_n. When that measure is zero it instead sets fn=0f_n=0, which does not dominate the indicator later bounded by fnf_n. The repair is direct: regularity gives, for every ε>0\varepsilon>0, a continuous function 0fn,ε10\leq f_{n,\varepsilon}\leq1 that equals one on KnK_n and has integral below ε\varepsilon. There are only finitely many nn, so the argument may be run with these majorants and then ε0\varepsilon\to0. This proves the same diagonal-mass bound.

Theorem 3.1Correct and complete after the stated repairs

The remaining reduction and approximation steps are complete

Pages 8–19 · Sections 3.1–3.4 · arXiv:2607.25773v2

The comparison between Jordan and Cartan data is made uniformly outside a neighborhood of the nontransverse locus. The boundary-pair cover is finite, the partition functions have the required supports, and the diagonal contribution tends to zero by the repaired Proposition 3.6. Upper and lower approximations of the test function then squeeze the normalized sums to the product Patterson–Sullivan integral.

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:2607.25773v2
Authors listed
Richard Canary, Tengren Zhang, Feng Zhu, Andrew Zimmer
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.