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Record W4415999104 · doi:10.4171/dm/1045

Mod $\ell$ gamma factors and a converse theorem for finite general linear groups

2025· article· W4415999104 on OpenAlex
Jacksyn Bakeberg, Mathilde Gerbelli-Gauthier, Heidi Goodson, Ashwin Iyengar, Gilbert Moss, Robin Zhang

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueDocumenta Mathematica · 2025
Typearticle
Language
FieldMathematics
TopicAdvanced Algebra and Geometry
Canadian institutionsUniversity of Toronto
FundersCity University of New YorkAmerican Institute of MathematicsNational Science Foundation
KeywordsConverseConverse theoremModuloModConjectureReduction (mathematics)

Abstract

fetched live from OpenAlex

The local converse theorem for Rankin–Selberg gamma factors of \mathrm{GL}_{2}(\mathbb{F}_{q}) proved by Piatetski-Shapiro over \mathbb{C} no longer holds after reduction modulo \ell\neq p . To remedy this, we construct new \mathrm{GL}_{n}\times\mathrm{GL}_{m} gamma factors valued in arbitrary \mathbb{Z}[1/p,\zeta_{p}] -algebras for Whittaker-type representations, show that they satisfy a functional equation, and then prove a \mathrm{GL}_{n}\times\mathrm{GL}_{n-1} converse theorem for irreducible cuspidal representations. In the \mathrm{GL}_{2}\times\mathrm{GL}_{1} case, we define an alternative “new” gamma factor, which takes values in k and satisfies a converse theorem that matches the converse theorem in characteristic 0 .

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Insufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: Theoretical or conceptual
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.202
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0000.001
Science and technology studies0.0010.000
Scholarly communication0.0000.001
Open science0.0010.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.023
GPT teacher head0.321
Teacher spread0.298 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it