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Erdős·erdos:202

Erdős Problem 202

problem formal record: solved source: solved (Lean)no F2 declared

No independent check recorded yet. A formal artifact, declaration or published object is attached, but no rebuild of it is recorded here.

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

covering systems·Source

AI activity

How grades work
GPT-5.4 Pro

2026-04-23·with Boon Suan Ho

Full solution

full A1 collaborative V1 write-up F2 declared
Reasoning and sources

Autonomy

AI collaborating with humans

GPT-5.5 Pro

2026-04-30·with Przemek Chojecki

Candidate full solution

candidate A1 collaborative V0 claimed F2 declared
Reasoning and sources

Autonomy

AI collaborating with humans

Unspecified

2026-05-14·supporting task

Boon Suan Ho and GPT-5.4 Pro (2026)

full A1 collaborative V1 write-up F2 declared
Reasoning and sources

Autonomy

Secondary contribution: formalization

Details

proof to formalize: Boon Suan Ho and GPT-5.4 Pro (2026)

Does the formal statement say what was claimed?

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

Computed from what the project declares and what the register holds, never from reading the mathematics. How fidelity is graded.

Follow and discuss

All discussion

Discussion and bounties for this problem load here.

Formal material

Formal statements · 1
Cited proofs · 1

Recorded elsewhere

Compare the registries
  • vibemathed — Erdős Problem #202

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

Also known as · 3
  • https://www.erdosproblems.com/202
  • https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/202.lean
  • FormalConjectures/ErdosProblems/202.lean