{
  "id": "2111.03004",
  "version": "v2",
  "published": "2021-11-04T17:03:22.000Z",
  "updated": "2022-07-07T15:27:17.000Z",
  "title": "Spherical varieties, functoriality, and quantization",
  "authors": [
    "Yiannis Sakellaridis"
  ],
  "comment": "This is an expanded version of my contribution to the 2022 ICM Proceedings. Small corrections in the latest version",
  "categories": [
    "math.RT",
    "math.NT"
  ],
  "abstract": "We discuss generalizations of the Langlands program, from reductive groups to the local and automorphic spectra of spherical varieties, and to more general representations arising as \"quantizations\" of suitable Hamiltonian spaces. To a spherical $G$-variety $X$, one associates a dual group ${^LG_X}$ and an $L$-value (encoded in a representation of ${^LG_X}$), which conjecturally describe the local and automorphic spectra of the variety. This sets up a problem of functoriality, for any morphism ${^LG_X}\\to {^LG_Y}$ of dual groups. We review, and generalize, Langlands' \"beyond endoscopy\" approach to this problem. Then, we describe the cotangent bundles of quotient stacks of the relative trace formula, and show that transfer operators of functoriality between relative trace formulas in rank 1 can be interpreted as a change of \"geometric quantization\" for these cotangent stacks.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2022-07-07T15:27:17.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11F70"
    ],
    "keywords": [
      "spherical varieties",
      "functoriality",
      "relative trace formula",
      "automorphic spectra",
      "dual group"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}