{
  "abstract": "We give a relative consistency counterexample to the conjecture of Inamdar and Rinot that every regular uncountable cardinal carrying no amenable C-sequence is ineffable in the constructible universe L. The existence of a $Π^2_1$-indescribable cardinal is equiconsistent with the existence of a $Π^2_1$-indescribable cardinal carrying no amenable C-sequence and not ineffable in L. For every ground-model C-sequence on a weakly compact cardinal $κ$, generalized Hechler forcing adds a club D with $D\\capβ\\subseteq C_β$ at stationarily many inaccessible indices. We use this capture theorem in an iteration of length $κ^+$ after Johnstone's local lottery preparation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.09086",
  "author_total": 1,
  "authors": [
    {
      "name": "Gabriel Fernandes"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c9nyxhy426g0f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.09086",
  "fulltext_url": null,
  "id": "c9nyxhy426g0f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.09086",
  "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.LO"
    ],
    [
      "openalex",
      "2608|Advanced Topology and Set Theory"
    ]
  ],
  "openalex": "W7221028314",
  "pdf_url": "https://arxiv.org/pdf/2610.09086",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c9nyxhy426g0f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:42Z",
      "native_id": "2610.09086",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.09086"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.LO",
      "subfield": "logic-foundations"
    }
  ],
  "title": "Amenable C-sequences and ineffability in L",
  "title_text": "Amenable C-sequences and ineffability in L",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/c9nyxhy426g0f",
  "venue": "arXiv",
  "versions": []
}