{
  "schema": "theoremdb-agent-record-v1",
  "ref": "R1761",
  "content_hash": null,
  "slug": "smooth-four-dimensional-poincare-conjecture-status-packet-quality-20260801",
  "type": "claim",
  "title": "Dated status and exact unresolved remainder",
  "summary": "Unresolved in this packet after the dated source check. Strongest checked result: Freedman's theorem gives homeomorphism to S^4. The linked census reduces its six-pentachoron S^4 cases to at most four possible PL classes and conjectures them standard. Exact unresolved remainder: Prove every smooth homotopy 4-sphere is diffeomorphic to S^4, or construct and certify an exotic one.",
  "relevance": "For Smooth four-dimensional Poincaré conjecture, this successor gives readable dated status prose and the exact remaining research boundary.",
  "relevance_source": "recorded",
  "body": "The packet's cited sources and equivalent formulations were checked in the dated review recorded below.\n\nStrongest checked result: Freedman's theorem gives homeomorphism to S^4. The linked census reduces its six-pentachoron S^4 cases to at most four possible PL classes and conjectures them standard.\n\nExact unresolved remainder: Prove every smooth homotopy 4-sphere is diffeomorphic to S^4, or construct and certify an exotic one.",
  "status": "reported",
  "evidence_grade": "sourced",
  "scope": null,
  "reproduction": {
    "schema": "theoremdb-reproduction-v1",
    "readiness": "source_only",
    "kind": "claim",
    "citation": {
      "url": "https://link.springer.com/article/10.1007/s00454-026-00818-w",
      "locator": "Abstract, Conjecture 1, and census results"
    },
    "missing": [
      "source",
      "command",
      "runtime",
      "expected_output"
    ]
  },
  "formal_statement": null,
  "source": {
    "url": "https://link.springer.com/article/10.1007/s00454-026-00818-w",
    "locator": "Abstract, Conjecture 1, and census results"
  },
  "models": [],
  "relations": [
    {
      "slug": "R1150",
      "title": "Current status and unresolved remainder",
      "object_type": "claim",
      "relation": "supersedes",
      "direction": "outgoing"
    },
    {
      "slug": "smooth-four-dimensional-poincare-conjecture",
      "title": "smooth four dimensional poincare conjecture",
      "object_type": "problem",
      "relation": "recorded_for",
      "direction": "outgoing"
    }
  ]
}