{
  "annotation_id": "6ce7a7ca-b7df-4252-b810-0d56a07c1dfd",
  "date_created": "2026-03-02T18:02:51.291000Z",
  "date_modified": "2026-03-02T18:02:51.291000Z",
  "file_hash": "c66db5783f64e7555dcc73dbb98014660fd75d7c74c67d48d924e748a7b3cb98",
  "private": false,
  "record": {
    "abstract": "Generalized Halphen systems are solved in terms of functions that uniformize\ngenus zero Riemann surfaces, with automorphism groups that are commensurable\nwith the modular group. Rational maps relating these functions imply subgroup\nrelations between their automorphism groups and symmetrization relations\nbetween the associated differential systems.",
    "arxiv_id": "solv-int/9902012",
    "authors": [
      "J. Harnad",
      "J. McKay"
    ],
    "categories": [
      "solv-int",
      "hep-th",
      "math-ph",
      "math.DS",
      "math.GR",
      "math.MP",
      "math.NT",
      "nlin.SI"
    ],
    "journal_ref": "CRM Proceedings and Lecture Notes Series 25, Symmetries and\n  Integrability of Difference Equations, pp. 181- 195 (eds. Decio Levy and\n  Orlando Ragnisco, AMS, Providence R.I., 2000)",
    "title": "Modular Invariants and Generalized Halphen Systems",
    "url": "https://arxiv.org/abs/solv-int/9902012"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "aae93252-d212-4ab0-8700-fb294808cbaa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}