Weighted residual polynomials on a circular arc
Complex Variables
2026-02-06 v1
Abstract
We study the behavior of weighted residual polynomials on circular arcs, including weighted Chebyshev polynomials. For weights given by reciprocals of polynomials, we establish Szeg\H{o}-Widom asymptotics. Extending our analysis to less regular weights, we determine the asymptotic behavior of the corresponding weighted Widom factors, generalizing results by Eichinger and Thiran et al. As an application, we derive the asymptotics of Widom factors on certain lemniscatic arcs.
Cite
@article{arxiv.2602.05428,
title = {Weighted residual polynomials on a circular arc},
author = {Jacob S. Christiansen and Benjamin Eichinger and Olof Rubin and Maxim Zinchenko},
journal= {arXiv preprint arXiv:2602.05428},
year = {2026}
}