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arxiv: 2605.04389 · v1 · submitted 2026-05-06 · 🧮 math.NT

Recognition: 2 theorem links

· Lean Theorem

Special periods and some non-tempered cases of the Gan-Gross-Prasad conjecture

Jaeho Haan, Sanghoon Kwon

Pith reviewed 2026-05-08 17:50 UTC · model grok-4.3

classification 🧮 math.NT
keywords Gan-Gross-Prasad conjecturespecial periodstheta liftsL-functionsclassical groupsautomorphic representationsnon-tempered casesRankin-Selberg method
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The pith

Relations between special periods and L-values prove three non-tempered higher-corank cases of the Gan-Gross-Prasad conjecture.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The authors connect special periods attached to automorphic representations of classical groups with the special values of associated L-functions. They analyze how these periods behave under the tower property that governs when global theta lifts are generic. Through Rankin-Selberg integral representations, they relate the analytic continuation and poles of L-functions to the vanishing of these periods. When combined with known criteria for when theta lifts do not vanish, this yields proofs for three explicit families of non-tempered automorphic representations satisfying the global Gan-Gross-Prasad conjecture.

Core claim

The central discovery is that the interaction of special periods with the tower property for theta lift genericity, studied via Rankin-Selberg integrals, establishes the required non-vanishing and period relations to confirm the Gan-Gross-Prasad conjecture for three specific higher-corank families in the non-tempered case.

What carries the argument

The interaction between special periods and the tower property for genericity of global theta lifts, together with Rankin-Selberg integrals linking periods to L-function properties.

If this is right

  • The Gan-Gross-Prasad conjecture holds for the three higher-corank non-tempered families identified.
  • Special periods can be used to detect non-vanishing of certain L-values in these settings.
  • The tower property extends to control the genericity of theta lifts for non-tempered representations.
  • Analytic properties of L-functions follow from the behavior of period integrals on classical groups.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • This method could extend to proving additional cases of the conjecture by identifying more families where the criteria apply.
  • Similar period-L-value relations might inform proofs for other period conjectures involving automorphic forms.
  • Computational checks for low-dimensional cases in these families could provide further evidence or counterexamples.

Load-bearing premise

The non-vanishing criteria for global theta lifts based on L-values hold without restrictions that would exclude the three targeted higher-corank families.

What would settle it

An explicit automorphic representation belonging to one of the three families where a special period vanishes despite a non-vanishing central L-value, or where the GGP period fails to match the L-value prediction, would disprove the relations used.

read the original abstract

In this paper, we establish a relationship between special periods and special L-values of automorphic representations of classical groups, and prove the non-tempered global Gan--Gross--Prasad conjecture in several cases. Our approach consists of two main steps. First, inspired by Rallis' tower property, we study the interaction between special periods and the tower property for the genericity of global theta lifts. Second, we investigate the relationship between the analytic properties of L-functions and special periods via the Rankin--Selberg integral method. Combining these results with non-vanishing criteria for global theta lifts in terms of various L-values, we prove three explicit higher-corank families of non-tempered cases of the global Gan--Gross--Prasad conjecture.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 0 minor

Summary. The manuscript establishes a relationship between special periods and special L-values of automorphic representations of classical groups. It studies the interaction between special periods and the tower property for the genericity of global theta lifts, inspired by Rallis' tower property. It also investigates the relationship between the analytic properties of L-functions and special periods using the Rankin-Selberg integral method. By combining these with non-vanishing criteria for global theta lifts in terms of L-values, the paper proves three explicit higher-corank families of non-tempered cases of the global Gan-Gross-Prasad conjecture.

Significance. If the results hold, this paper makes a significant contribution to the Gan-Gross-Prasad conjecture by providing explicit examples in higher-corank non-tempered cases, which are challenging. The approach builds on established tools such as the Rallis tower property and Rankin-Selberg integrals, and the combination with non-vanishing criteria offers a systematic way to handle these cases. The explicit families identified could serve as test cases for further generalizations.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the careful summary of our manuscript, the positive assessment of its significance, and the recommendation for minor revision. No specific major comments were raised in the report.

Circularity Check

0 steps flagged

No significant circularity identified

full rationale

The derivation proceeds by relating special periods to L-values via the Rallis tower property for theta-lift genericity and Rankin-Selberg integrals, then invoking independent non-vanishing criteria to obtain explicit families for the non-tempered GGP conjecture. No step reduces by construction to a fitted input renamed as prediction, a self-definitional equivalence, or a load-bearing self-citation chain whose validity depends on the target result. The cited tools are standard external results in the literature whose independence is not contradicted by the paper's own equations or assumptions.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 0 invented entities

The abstract indicates reliance on standard background results in the theory of automorphic forms, L-functions, and theta correspondences; no new free parameters, ad-hoc axioms, or invented entities are mentioned.

axioms (2)
  • domain assumption Standard properties of L-functions attached to automorphic representations of classical groups and non-vanishing criteria for theta lifts
    Invoked when combining analytic properties with non-vanishing results to obtain the period statements.
  • domain assumption Rallis tower property for genericity of global theta lifts
    Used as the first main step to study interaction with special periods.

pith-pipeline@v0.9.0 · 5423 in / 1393 out tokens · 44757 ms · 2026-05-08T17:50:16.309162+00:00 · methodology

discussion (0)

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Reference graph

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