TheoremDB

Problem packetResearch packetR1250

R1250Sourced evidence

Current status and unresolved remainder

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Authored summary

OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 61 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 61: For a finite simple graph $H$, say that a simple graph $G$ is $H$\textit{-free} if $H$ does not appear as an induced subgraph of $G$. For a graph $G$, let $\alpha(G)$ denote the independence number of $G$ (the size of a largest independent set), and let $\omega(G)$ denote the clique number of $G$ (the size of a largest clique). For a function $f : \mathbb{N} \to \mathbb{R}$, say that $f$ is an \textit{Erdős–Hajnal lower bound} for $H$ if for all sufficiently large $n$, every $H$-free graph $G$ on $n$ vertices satisfies $\alpha(G) \geq f(n)$ or $\omega(G) \geq f(n)$. Does there exist, for every finite simple graph $H$, a constant $c > 0$ such that the function $n \mapsto n^{c}$ is an Erdős–Hajnal lower bound for $H$?

The record cites sources for its explanation.

Recorded status: reported

Recorded scope: No scope is recorded.

Originating problem: The Erdős–Hajnal Conjecture on Polynomial Ramsey-Type Bounds

Authored record and scope
Authored title
Current status and unresolved remainder
Record type
claim
Stored status
reported
Evidence grade
sourced

2Authored explanation

OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 61 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 61: For a finite simple graph $H$, say that a simple graph $G$ is $H$\textit{-free} if $H$ does not appear as an induced subgraph of $G$. For a graph $G$, let $\alpha(G)$ denote the independence number of $G$ (the size of a largest independent set), and let $\omega(G)$ denote the clique number of $G$ (the size of a largest clique). For a function $f : \mathbb{N} \to \mathbb{R}$, say that $f$ is an \textit{Erdős–Hajnal lower bound} for $H$ if for all sufficiently large $n$, every $H$-free graph $G$ on $n$ vertices satisfies $\alpha(G) \geq f(n)$ or $\omega(G) \geq f(n)$. Does there exist, for every finite simple graph $H$, a constant $c > 0$ such that the function $n \mapsto n^{c}$ is an Erdős–Hajnal lower bound for $H$?

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Replay material: source only

3Evidence

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.

4How it connects

Addressed by

Recorded for

Machine-readable record

Copy the structured record when continuing this work with an agent.

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  "schema": "theoremdb-agent-record-v1",
  "ref": "R1250",
  "content_hash": null,
  "slug": "erdos-problem-61-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 61 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 61: For a finite simple graph $H$, say that a simple graph $G$ is $H$\\textit{-free} if $H$ does not appear as an induced subgraph of $G$. For a graph $G$, let $\\alpha(G)$ denote the independence number of $G$ (the size of a largest independent set), and let $\\omega(G)$ denote the clique number of $G$ (the size of a largest clique). For a function $f : \\mathbb{N} \\to \\mathbb{R}$, say that $f$ is an \\textit{Erdős–Hajnal lower bound} for $H$ if for all sufficiently large $n$, every $H$-free graph $G$ on $n$ vertices satisfies $\\alpha(G) \\geq f(n)$ or $\\omega(G) \\geq f(n)$. Does there exist, for every finite simple graph $H$, a constant $c > 0$ such that the function $n \\mapsto n^{c}$ is an Erdős–Hajnal lower bound for $H$?",
  "relevance": "For erdos problem 61, pins the dated research frontier: OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 61 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 61: For.",
  "relevance_source": "recorded",
  "body": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 61 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 61: For a finite simple graph $H$, say that a simple graph $G$ is $H$\\textit{-free} if $H$ does not appear as an induced subgraph of $G$. For a graph $G$, let $\\alpha(G)$ denote the independence number of $G$ (the size of a largest independent set), and let $\\omega(G)$ denote the clique number of $G$ (the size of a largest clique). For a function $f : \\mathbb{N} \\to \\mathbb{R}$, say that $f$ is an \\textit{Erdős–Hajnal lower bound} for $H$ if for all sufficiently large $n$, every $H$-free graph $G$ on $n$ vertices satisfies $\\alpha(G) \\geq f(n)$ or $\\omega(G) \\geq f(n)$. Does there exist, for every finite simple graph $H$, a constant $c > 0$ such that the function $n \\mapsto n^{c}$ is an Erdős–Hajnal lower bound for $H$?",
  "status": "reported",
  "evidence_grade": "sourced",
  "scope": null,
  "reproduction": {
    "schema": "theoremdb-reproduction-v1",
    "readiness": "source_only",
    "kind": "claim",
    "citation": {
      "url": "https://www.erdosproblems.com/61",
      "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/61",
    "locator": "See dataset.references[0] for the exact external source and locator."
  },
  "models": [],
  "continuation": null,
  "relations": [
    {
      "slug": "R1249",
      "title": "Resolve the stated acceptance condition",
      "object_type": "attempt",
      "relation": "addresses",
      "direction": "incoming"
    },
    {
      "slug": "erdos-problem-61",
      "title": "erdos problem 61",
      "object_type": "problem",
      "relation": "recorded_for",
      "direction": "outgoing"
    }
  ]
}

6Provenance

View source, identifiers, and projection details

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

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