TheoremDB

Problem packetResearch packetR1262

R1262Sourced evidence

Current status and unresolved remainder

View evidenceOpen source ↗
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Authored summary

OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 82 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 82: For each positive integer \(n\), let \(F(n)\) denote the largest integer such that every finite simple graph on \(n\) vertices contains a regular induced subgraph with at least \(F(n)\) vertices. Here, a regular induced subgraph of a graph \(G\) is an induced subgraph that is \(k\)-regular for some non-negative integer \(k\), meaning every vertex in the subgraph has exactly \(k\) neighbors within the subgraph. Determine whether \(\displaystyle \frac{F(n)}{\log n} \to \infty\) as \(n \to \infty\).

The record cites sources for its explanation.

Recorded status: reported

Recorded scope: No scope is recorded.

Originating problem: Asymptotic growth of the maximum guaranteed order of a regular induced subgraph

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 82 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 82: For each positive integer \(n\), let \(F(n)\) denote the largest integer such that every finite simple graph on \(n\) vertices contains a regular induced subgraph with at least \(F(n)\) vertices. Here, a regular induced subgraph of a graph \(G\) is an induced subgraph that is \(k\)-regular for some non-negative integer \(k\), meaning every vertex in the subgraph has exactly \(k\) neighbors within the subgraph. Determine whether \(\displaystyle \frac{F(n)}{\log n} \to \infty\) as \(n \to \infty\).

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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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  "ref": "R1262",
  "content_hash": null,
  "slug": "erdos-problem-82-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 82 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 82: For each positive integer \\(n\\), let \\(F(n)\\) denote the largest integer such that every finite simple graph on \\(n\\) vertices contains a regular induced subgraph with at least \\(F(n)\\) vertices. Here, a regular induced subgraph of a graph \\(G\\) is an induced subgraph that is \\(k\\)-regular for some non-negative integer \\(k\\), meaning every vertex in the subgraph has exactly \\(k\\) neighbors within the subgraph. Determine whether \\(\\displaystyle \\frac{F(n)}{\\log n} \\to \\infty\\) as \\(n \\to \\infty\\).",
  "relevance": "For erdos problem 82, pins the dated research frontier: OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 82 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 82: For.",
  "relevance_source": "recorded",
  "body": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 82 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 82: For each positive integer \\(n\\), let \\(F(n)\\) denote the largest integer such that every finite simple graph on \\(n\\) vertices contains a regular induced subgraph with at least \\(F(n)\\) vertices. Here, a regular induced subgraph of a graph \\(G\\) is an induced subgraph that is \\(k\\)-regular for some non-negative integer \\(k\\), meaning every vertex in the subgraph has exactly \\(k\\) neighbors within the subgraph. Determine whether \\(\\displaystyle \\frac{F(n)}{\\log n} \\to \\infty\\) as \\(n \\to \\infty\\).",
  "status": "reported",
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    "citation": {
      "url": "https://www.erdosproblems.com/82",
      "locator": "See dataset.references[0] for the exact external source and locator."
    },
    "missing": [
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  "formal_statement": null,
  "source": {
    "url": "https://www.erdosproblems.com/82",
    "locator": "See dataset.references[0] for the exact external source and locator."
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  "models": [],
  "continuation": null,
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      "slug": "R1261",
      "title": "Resolve the stated acceptance condition",
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}

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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