English

On the calculation of the ramified Siegel series

Number Theory 2025-09-03 v2

Abstract

The ramified Siegel series is an important factor that appears in the Fourier coefficient of the Siegel Eisenstein series.Many formulas for the ramified Siegel series under various conditions are already known.However, an explicit formula for the general case has not yet been obtained.We derive a formula for the Siegel series with arbitrary dimension nn, assuming that the additive character ψ\psi is primitive.Our results cover nonarchimedean, non-dyadic local fields FF, including the case F=QpF=\mathbb{Q}_p.We also give explicit values of the ramified Siegel series for degrees n=1,2,n=1, 2, and 33.

Keywords

Cite

@article{arxiv.2302.04429,
  title  = {On the calculation of the ramified Siegel series},
  author = {Masahiro Watanabe},
  journal= {arXiv preprint arXiv:2302.04429},
  year   = {2025}
}