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Symplectic Kloosterman Sums for $\operatorname{Sp}(2n)$ with Powerful Moduli

Number Theory 2025-12-19 v1

Abstract

We prove a non-trivial bound for Sp(2n)\operatorname{Sp}(2n) Kloosterman sums of moduli not equal to a prime multiple of the identity. These sums are attached to Siegel modular forms on the group Sp(2n)\operatorname{Sp}(2n) and appear in the corresponding Petersson formula. We give an application to equidistribution of coprime symmetric pairs.

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Cite

@article{arxiv.2512.16680,
  title  = {Symplectic Kloosterman Sums for $\operatorname{Sp}(2n)$ with Powerful Moduli},
  author = {Gilles Felber},
  journal= {arXiv preprint arXiv:2512.16680},
  year   = {2025}
}

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48 pages