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Erdős·erdos:619

Erdős Problem 619

problem formal record: solved source: solved (Lean) F2 declared

Checked, not verified. 2 independent checks recorded, with verdict not self-contained. The checks are set out below.

Fidelity F2: The statement corpus cites this proof against its own statement.

graph theory·Source

AI activity

How grades work
Claude Fable 5, Codex, GPT-5.5

9 Jun 2026

Full solution (Lean)

full A3 V2 F2
Reasoning and sources

Autonomy

AI standalone; human involvement recorded as non-significant

F2 declared. The statement corpus cites this proof against its own statement.

Checks

2
  • not self-contained·qed.bot

    imports project modules: FormalConjectures.Util.ProblemImports

    proof rebuilt and axioms inspected·2026-08-21

  • not self-contained·qed.bot

    imports project modules: Erdos

    proof rebuilt and axioms inspected·2026-08-21

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Formal material

Formal statements · 1
Cited proofs · 2

Recorded elsewhere

Compare the registries
  • vibemathed — Erdős Problem #619

    checked·machine-led·their labels: lean-verified, ai-discovered

Also known as · 3
  • https://www.erdosproblems.com/619
  • https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/619.lean
  • FormalConjectures/ErdosProblems/619.lean

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qed.bot, “Erdős Problem 619”, https://qed.bot/s/erdos-619, as of 30 Sep 2026.

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