PreprintCC BY 4.0arXiv
A Local Fourier-Transform Proof of Offen's Spherical Transfer Theorem
Abstract
Let E/F be an unramified quadratic extension of non-archimedean local fields of characteristic zero and odd residual characteristic. Offen proved that, on the full spherical space of nondegenerate Hermitian matrices, equality of the Hironaka and Satake transforms implies Jacquet--Ye matching. We give a purely local proof of this theorem. The argument combines Jacquet's compatibility of matching with Fourier transform, the Godement--Jacquet functional equation, and Hironaka's scalar functional equation for Hermitian zeta integrals. The local proof recovers Jacquet's spherical-Hecke fundamental lemma from the unit case.
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BibTeX
@misc{mao2026local,
title = {{A Local Fourier-Transform Proof of Offen's Spherical Transfer Theorem}},
author = {Zhengyu Mao and Chen Wan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40819},
eprint = {2610.40819},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40819},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A Local Fourier-Transform Proof of Offen's Spherical Transfer Theorem
AU - Zhengyu Mao
AU - Chen Wan
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40819
UR - https://arxiv.org/abs/2610.40819
AB - Let E/F be an unramified quadratic extension of non-archimedean local fields of characteristic zero and odd residual characteristic. Offen proved that, on the full spherical space of nondegenerate Hermitian matrices, equality of the Hironaka and Satake transforms implies Jacquet--Ye matching. We give a purely local proof of this theorem. The argument combines Jacquet's compatibility of matching with Fourier transform, the Godement--Jacquet functional equation, and Hironaka's scalar functional equation for Hermitian zeta integrals. The local proof recovers Jacquet's spherical-Hecke fundamental lemma from the unit case.
ER -