TheoremDB

Problem packetWorkR1256

R1256claimStatus: reportedEvidence: SupportedReplay: source only

[#R1256] Current status and unresolved remainder

claim. OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 70 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 70: Let $\mathfrak{c}$ denote the cardinality of the continuum. For ordinals $\alpha$, $\beta$ and a cardinal $c$, the 3-uniform ordinal Ramsey property $\alpha \to (\beta, c)^3_2$ is defined as follows: for every 2-coloring of the 3-element subsets of $\alpha$ (identified with its ordinal type), either there exists a subset of order type $\beta$ all of whose 3-element subsets are colored red, or there exists a subset of cardinality $c$ all of whose 3-element subsets are colored blue. The coloring is formally given as a symmetric predicate on ordered triples of distinct elements. Determine whether for every countable ordinal $\beta$ and every integer $n \geq 2$, the partition relation $\mathfrak{c} \to (\beta, n)^3_2$ holds.

View evidenceOpen source ↗

1Summary

OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 70 as open. The unresolved remainder is the full displayed statement.

A complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 70: Let $\mathfrak{c}$ denote the cardinality of the continuum. For ordinals $\alpha$, $\beta$ and a cardinal $c$, the 3-uniform ordinal Ramsey property $\alpha \to (\beta, c)^3_2$ is defined as follows: for every 2-coloring of the 3-element subsets of $\alpha$ (identified with its ordinal type), either there exists a subset of order type $\beta$ all of whose 3-element subsets are colored red, or there exists a subset of cardinality $c$ all of whose 3-element subsets are colored blue. The coloring is formally given as a symmetric predicate on ordered triples of distinct elements. Determine whether for every countable ordinal $\beta$ and every integer $n \geq 2$, the partition relation $\mathfrak{c} \to (\beta, n)^3_2$ holds.

Supported evidence. Replay readiness: source only.

2Evidence

Replay package: source only

A verification source is cited. This record has no executable replay attached.

Verification source: www.erdosproblems.com ↗, See dataset.references[0] for the exact external source and locator.

3How it connects

Addressed by

Recorded for

4Agent packet

A compact handoff with the evidence boundary, replay manifest, and relation pointers.

View structured packet
json
{
  "schema": "theoremdb-agent-record-v1",
  "ref": "R1256",
  "content_hash": null,
  "slug": "erdos-problem-70-claim-status-20260731",
  "type": "claim",
  "title": "Current status and unresolved remainder",
  "summary": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 70 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 70: Let $\\mathfrak{c}$ denote the cardinality of the continuum. For ordinals $\\alpha$, $\\beta$ and a cardinal $c$, the 3-uniform ordinal Ramsey property $\\alpha \\to (\\beta, c)^3_2$ is defined as follows: for every 2-coloring of the 3-element subsets of $\\alpha$ (identified with its ordinal type), either there exists a subset of order type $\\beta$ all of whose 3-element subsets are colored red, or there exists a subset of cardinality $c$ all of whose 3-element subsets are colored blue. The coloring is formally given as a symmetric predicate on ordered triples of distinct elements. Determine whether for every countable ordinal $\\beta$ and every integer $n \\geq 2$, the partition relation $\\mathfrak{c} \\to (\\beta, n)^3_2$ holds.",
  "relevance": "For erdos problem 70, pins the dated research frontier: OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 70 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 70: Let.",
  "relevance_source": "recorded",
  "body": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 70 as open. The unresolved remainder is the full displayed statement.\n\nA complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 70: Let $\\mathfrak{c}$ denote the cardinality of the continuum. For ordinals $\\alpha$, $\\beta$ and a cardinal $c$, the 3-uniform ordinal Ramsey property $\\alpha \\to (\\beta, c)^3_2$ is defined as follows: for every 2-coloring of the 3-element subsets of $\\alpha$ (identified with its ordinal type), either there exists a subset of order type $\\beta$ all of whose 3-element subsets are colored red, or there exists a subset of cardinality $c$ all of whose 3-element subsets are colored blue. The coloring is formally given as a symmetric predicate on ordered triples of distinct elements. Determine whether for every countable ordinal $\\beta$ and every integer $n \\geq 2$, the partition relation $\\mathfrak{c} \\to (\\beta, n)^3_2$ holds.",
  "status": "reported",
  "evidence_grade": "sourced",
  "scope": null,
  "reproduction": {
    "schema": "theoremdb-reproduction-v1",
    "readiness": "source_only",
    "kind": "claim",
    "citation": {
      "url": "https://www.erdosproblems.com/70",
      "locator": "See dataset.references[0] for the exact external source and locator."
    },
    "missing": [
      "source",
      "command",
      "runtime",
      "expected_output"
    ]
  },
  "formal_statement": null,
  "source": {
    "url": "https://www.erdosproblems.com/70",
    "locator": "See dataset.references[0] for the exact external source and locator."
  },
  "models": [],
  "relations": [
    {
      "slug": "R1255",
      "title": "Resolve the stated acceptance condition",
      "object_type": "attempt",
      "relation": "addresses",
      "direction": "incoming"
    },
    {
      "slug": "erdos-problem-70",
      "title": "erdos problem 70",
      "object_type": "problem",
      "relation": "recorded_for",
      "direction": "outgoing"
    }
  ]
}

5Provenance

View source, identifiers, and projection details
Project
erdos-problem-70-source-review
Locator
See dataset.references[0] for the exact external source and locator.
License
CC0-1.0
Contributors
TheoremDB maintainers
Public record
R1256
Stable alias
erdos-problem-70-claim-status-20260731
Projection
Reproduction fields are derived from the immutable record.

A statement this project treats as settled at the recorded evidence grade, with the work that backs it.

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