On non-generic unramified genuine representations

We discuss Ginzburg’s conjecture relating non-generic unramified genuine representations to non-generic theta representations of Levi subgroups. On one hand, we give concrete counterexamples to the conjecture when stated in its original generality. On the other hand, we show that the conjecture does hold for unramified genuine representations whose Kazhdan–Lusztig–Reeder parameters are dictated by the regular orbits of dual Levi subgroups.

Authors

Publication Details

Journal
Proceedings of the American Mathematical Society
Published
2026-07-23
DOI
https://doi.org/10.1090/proc/17818
Primary Topic
Advanced Algebra and Geometry
Type
article
Field-Weighted Citation Impact
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article

On non-generic unramified genuine representations

Fan Gao
Proceedings of the American Mathematical Society
Advanced Algebra and Geometry
article

On non-generic unramified genuine representations

Fan Gao
article en

Abstract

We discuss Ginzburg’s conjecture relating non-generic unramified genuine representations to non-generic theta representations of Levi subgroups. On one hand, we give concrete counterexamples to the conjecture when stated in its original generality. On the other hand, we show that the conjecture does hold for unramified genuine representations whose Kazhdan–Lusztig–Reeder parameters are dictated by the regular orbits of dual Levi subgroups.

Proceedings of the American Mathematical Society
Openalex Percentile: Top 4%
Advanced Algebra and Geometry
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On non-generic unramified genuine representations — Fan Gao · Proceedings of the American Mathematical Society (2026) | TGRS Research Map | TGRS