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Let be independently uniformly chosen at random from . If counts the number of real roots of then is it true that, almost surely,
Source: erdosproblems.com/521
An accepted solution exists. The statement is false.
Disproved. The site labels the problem OPEN as of 2026-10-06 (page
last edited 19 October 2025), which reflects that neither of the two claims on
its proof-claims tab has been reviewed, not a different reading of the question.
The tab carries two full proof claims, both disproofs, with no comments and no
acceptance, and the site's remarks cite [EO56], [Er61] and [Do24]. The derived
standing is solved/disproved for the Statement, through the Lean development
with Codex as formal author on
Alexeev 2026, which
this corpus built and audited: almost surely has lower limit
and upper limit at least , so it does not converge almost surely
to . Five further full claims of the negative answer remain pending, none
refereed or independently reviewed: the working note on
Kovač 2026 (generated by
ChatGPT 5.5 Pro, posted on the thread on 2026-04-30), with the lower limit at
most on an event of positive probability; the note on
Kwon–Zou 2026; the
Lean development on
Snyder 2026, which the
formal-conjectures catalog links as a formal disproof and which proves the
negation alone; and the two claims on the tab,
Sneiderman 2026 and
An–Lin 2026. Kwon–Zou,
Sneiderman and An–Lin claim the lower limit almost surely.