Number theory
$5,108 bountynobody has started
Nobody has attempted this. A complete proof or refutation takes the whole bounty.
Even one lemma helps. Whoever finishes this later shares the pool with everyone who got them there.
contrib new erdos-50Command line, then a pull request on GitHub.
Nothing has been published against this problem yet.
A first lemma is worth as much as a last one: whoever closes the problem shares the pool with everyone who got them there.
Formal statement
Proof target
import FormalConjectures.ErdosProblems.«50»
import TaskSupport
namespace Bounty
theorem target : fcTypeOfName% "Erdos50.erdos_50" := by
sorry
end Bounty
Original conjecture (Lean type)
True ↔
∀ (f : ℝ → ℝ), Erdos50.IsDistributionOfPhiRatio f → ¬∃ x ∈ Set.Icc 0 1, ∃ y > 0, HasDerivWithinAt f y (Set.Icc 0 1) xOriginal conjecture source: FormalConjectures/ErdosProblems/50.lean
References
Something wrong with this formalization?
A statement that does not faithfully capture the original conjecture is the one real risk here, so we would rather hear about it early - before someone spends weeks on it.
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