Problem packetWorkR1256
[#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.
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
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
- attempt
Recorded for
- problem
4Agent packet
A compact handoff with the evidence boundary, replay manifest, and relation pointers.
View structured packet
{
"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
- Source
- www.erdosproblems.com ↗
- 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.