Ramanujan-Arthur Decompositions of Cuspidal Functions at Full Finite Level

OpenAI

For split connected semisimple groups over global function fields and every effective divisor, including arbitrary multiplicity, rational and ℓ-adic cuspidal-function spaces split into direct sums indexed by dual-group nilpotent orbits. The same orbit controls all unramified Hecke places.

Sources for this record

What was already known

Gaitsgory, Lafforgue and Raskin conjectured the rational and ℓ-adic decompositions at level zero and developed the surrounding filtration. Earlier parameter results did not establish arbitrary finite level.

AI involvement AI-led

OpenAI credits its internal model with the manuscript and its new finite-level argument. The earlier conjectures and filtration are human work.

The repository attributes the new manuscript to internal-model production; GLR’s earlier conjectures and machinery remain human inputs.

Importance Major

The result resolves two named cusp-decomposition conjectures and extends them to full finite level.

Limitations

The categorical trace, purity and finite-level arguments await a documented completed specialist check. A later global Arthur enhancement assumes this decomposition.

Technical verification Reported

The paper contains a proof but no completed human or machine check specific to this decomposition is documented; Reported is the evidence default.

Human understanding Few

No named human explains the new spectral extraction and finite-level rotation mechanism; Few is the evidence default.

Correction and publication history

2026-10-18 · publication

If correct, the result resolves two named cusp-decomposition conjectures and extends them to full finite level.

Read this published revision