{
  "id": "2005.02438",
  "version": "v1",
  "published": "2020-05-05T18:54:03.000Z",
  "updated": "2020-05-05T18:54:03.000Z",
  "title": "Arthur packets for $G_2$ and perverse sheaves on cubics",
  "authors": [
    "Clifton Cunningham",
    "Andrew Fiori",
    "Qing Zhang"
  ],
  "categories": [
    "math.RT",
    "math.AG",
    "math.NT"
  ],
  "abstract": "This paper begins the project of defining Arthur packets of all unipotent representations for the $p$-adic exceptional group $G_2$. Here we treat the most interesting case by defining and computing Arthur packets with component group $S_3$. We also show that the distributions attached to these packets are stable, subject to a hypothesis. This is done using a self-contained microlocal analysis of simple equivariant perverse sheaves on the moduli space of homogeneous cubics in two variables. In forthcoming work we will treat the remaining unipotent representations and their endoscopic classification and strengthen our result on stability.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-05-05T18:54:03.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11F70",
      "32S60"
    ],
    "keywords": [
      "unipotent representations",
      "simple equivariant perverse sheaves",
      "adic exceptional group",
      "paper begins",
      "defining arthur packets"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}