English

Arithmetic Fundamental Lemma for the spherical Hecke algebra

Number Theory 2024-05-24 v2 Algebraic Geometry Representation Theory

Abstract

We define Hecke correspondences and Hecke operators on unitary RZ spaces and study their basic geometric properties, including a commutativity conjecture on Hecke operators. Then we formulate the Arithmetic Fundamental Lemma conjecture for the spherical Hecke algebra. We also formulate a conjecture on the abundance of spherical Hecke functions with identically vanishing first derivative of orbital integrals. We prove these conjectures for the case U(1)×U(2)U(1)\times U(2).

Keywords

Cite

@article{arxiv.2305.14465,
  title  = {Arithmetic Fundamental Lemma for the spherical Hecke algebra},
  author = {Chao Li and Michael Rapoport and Wei Zhang},
  journal= {arXiv preprint arXiv:2305.14465},
  year   = {2024}
}

Comments

50 pages. Revised, incorporating suggestions of the referee. To appear in Manuscripta Math

R2 v1 2026-06-28T10:43:35.981Z