Skip to content

Erdős problem 1047

Let f∈C[x]f\in \mathbb{C}[x] be a monic polynomial with mm distinct roots, and let c>0c>0 be a constant small enough such that {z:∣f(z)∣≤c}\{ z: \lvert f(z)\rvert\leq c\} has mm distinct connected components.

Sources

The source's own material, retained exactly.

6 retained statements36c6d0fef71a

Open selected source

FormalConjectures/ErdosProblems/

1047.lean

Retained formal statement6 of 6

The referee of the paper [Go66] also gave the example of ∣z(z5−1)∣<5⋅6−6/5\lvert z(z^5-1)\rvert< 5\cdot 6^{-6/5}.

FormalConjectures/ErdosProblems/1047.leanErdos1047.erdos_1047.variants.referee5 linesExact file
(Erdos1047.componentsIn        (Erdos1047.strictSublevelSet (Polynomial.X * (Polynomial.X ^ 5 - 1)) (5 * 6 ^ (-6 / 5)))).ncard =    6 ∧  ∃ t ∈ Erdos1047.componentsIn (Erdos1047.strictSublevelSet (Polynomial.X * (Polynomial.X ^ 5 - 1)) (5 * 6 ^ (-6 / 5))),    ¬Convex ℝ t
SolvedStatement only, no proof