{
  "abstract": "We show that, in characteristic $p$, almost all projective homogeneous varieties under a reductive group and with non-reduced stabilizer do not lift to characteristic $p^2$. To this end, first we develop a general framework for equivariant deformation theory, leading to practical criteria ensuring that the deformations of a scheme come with deformations of a group scheme action. Second, we establish a formula to compute the cohomology of equivariant vector bundles over projective homogeneous varieties with non-reduced stabilizer, enabling us to determine the $G$-module structure of the first cohomology groups of their tangent bundles.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.25590",
  "author_total": 1,
  "authors": [
    {
      "name": "Noé Sotto"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0bpcjvewf20ev.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.25590",
  "fulltext_url": null,
  "id": "0bpcjvewf20ev",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.25590",
  "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"
    ],
    [
      "openalex",
      "2608|Algebraic Geometry and Number Theory"
    ]
  ],
  "openalex": "W7223064206",
  "pdf_url": "https://arxiv.org/pdf/2610.25590",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0bpcjvewf20ev.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:57Z",
      "native_id": "2610.25590",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.25590"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.AG",
      "subfield": "algebra-number-theory"
    }
  ],
  "title": "Equivariant deformation theory and deformations of homogeneous varieties",
  "title_text": "Equivariant deformation theory and deformations of homogeneous varieties",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:44Z",
  "url": "https://research.draconitic.com/paper/0bpcjvewf20ev",
  "venue": "arXiv",
  "versions": []
}