Erdős·erdos:224

Erdős Problem 224

problem formal record: solved source: proved (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.

geometry·Source

AI activity

Codex, GPT-5.2 Thinking

2026-01-14

New proof found (Lean)

full A2 directed V2 artifact F2 declared

Reasoning and sources

AI building on literature supplied to it

literature: 🟢 Danzer and Grünbaum (1962)

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.

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Formal statements · 1

FormalConjectures/ErdosProblems/224.lean
1 declarations, 1 unproved goals·research solved

Cited proofs · 1

Also known as · 3

https://www.erdosproblems.com/224
https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/224.lean
FormalConjectures/ErdosProblems/224.lean