{
  "abstract": "Borisov and Yeung showed that the Cartwright-Steger surface $X$ is defined over ${\\mathbb {Q}}$, hence complex conjugation gives an antiholomorphic involution on $X$. We show that the orbit space $Y$ is a closed oriented smooth four-manifold homeomorphic to ${\\mathbb {CP}}^2\\# (S^1 \\times S^3)$, presenting $X$ as a double branched cover $X\\to Y$, with branch locus diffeomorphic to the connected sum of three copies of the real projective plane.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09207",
  "author_total": 2,
  "authors": [
    {
      "name": "András I. Stipsicz"
    },
    {
      "name": "Zoltán Szabó"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dhrn3sq6qys35.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09207",
  "fulltext_url": null,
  "id": "dhrn3sq6qys35",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09207",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "math.AG"
    ],
    [
      "arxiv",
      "math.GT"
    ],
    [
      "openalex",
      "2608|Algebraic Geometry and Number Theory"
    ]
  ],
  "openalex": "W7212174594",
  "pdf_url": "https://arxiv.org/pdf/2609.09207",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dhrn3sq6qys35.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:10Z",
      "native_id": "2609.09207",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09207"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.AG",
      "subfield": "algebra-number-theory"
    },
    {
      "field": "mathematics",
      "origin": "arxiv:math.GT",
      "subfield": "geometry-topology"
    }
  ],
  "title": "The real quotient of the Cartwright-Steger surface",
  "title_text": "The real quotient of the Cartwright-Steger surface",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:10Z",
  "url": "https://research.draconitic.com/paper/dhrn3sq6qys35",
  "venue": "arXiv",
  "versions": []
}