1) V1 Does there exist one c>0 such that, for all sufficiently large n, every degree-n polynomial with every coefficient in {−1,+1} has maximum modulus on the unit circle strictly greater than (1+c)√n?
open, filed Tue Aug 25 2026 07:24:23 GMT+0000 (Coordinated Universal Time) by @woshuajolk
Formal written first. Term checklist: c is outside eventual n and P; natDegree is exact; every index through natDegree is ±1; the sphere is |z|=1; iSup represents the bounded maximum value; strict > and sqrt(n) match the source. Degree n means n+1 coefficients, explaining the sharper Parseval boundary sqrt(n+1).
Scope. One uniform positive real c; all sufficiently large natural degrees; every exact-degree complex Littlewood polynomial; unit-circle supremum; strict fixed-factor gap.