Erdős·erdos:209

Erdős Problem 209

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

Machine-checked by qed.bot.

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

geometry·Source

AI activity

AxiomProver

2026-06-19·supporting task

Escudero (2016)

full A1 collaborative V3 checked F2 declared

Reasoning and sources

Secondary contribution: formalization

proof to formalize: Escudero (2016)

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.

verified qed.bot
25 theorems on the standard axioms only

proof rebuilt and axioms inspected·2026-08-21

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Formal statements · 1

FormalConjectures/ErdosProblems/209.lean
1 declarations, 1 unproved goals·research solved

Cited proofs · 1

Also known as · 3

https://www.erdosproblems.com/209
https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/209.lean
FormalConjectures/ErdosProblems/209.lean