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Erdős·erdos:1089

Erdős Problem 1089

problem formal record: solved source: solvedno 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.

geometry, distances·Source

AI activity

How grades work
Aletheia

2026-02-01

Full solution found

full A3 autonomous V1 write-up F2 declared
Reasoning and sources

Autonomy

AI standalone, with comparable literature existing

Details

literature: 🟢 Bannai and Bannai (1981)

literature found on: 1 Feb, 2026

similar?: Yes

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 #1089

    reviewed·machine-led·their labels: site-confirmed, ai-discovered

Also known as · 3
  • https://www.erdosproblems.com/1089
  • https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/1089.lean
  • FormalConjectures/ErdosProblems/1089.lean