{
  "id": "2007.03998",
  "version": "v1",
  "published": "2020-07-08T10:00:14.000Z",
  "updated": "2020-07-08T10:00:14.000Z",
  "title": "The automorphism group of the modular curve $X_0^*(N)$ with square-free level",
  "authors": [
    "Francesc Bars",
    "Josep González"
  ],
  "categories": [
    "math.NT",
    "math.AG"
  ],
  "abstract": "We determine the automorphism group of the modular curve $X_0^*(N)$, obtained as the quotient of the modular curve $X_0(N)$ by the group of its Atkin-Lehner involutions, for all square-free values of $N$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-07-08T10:00:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "modular curve",
      "automorphism group",
      "square-free level",
      "atkin-lehner involutions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}