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Corpus ID: 128358591

Bounds on strong unicity for Chebyshev approximation with bounded coefficients

@article{Sipos2019BoundsOS,
title={Bounds on strong unicity for Chebyshev approximation with bounded coefficients},
author={A. Sipos},
journal={arXiv: Classical Analysis and ODEs},
year={2019}
}

We obtain new effective results in best approximation theory, specifically moduli of uniqueness and constants of strong unicity, for the problem of best uniform approximation with bounded coefficients, as first considered by Roulier and Taylor. We make use of techniques from the field of proof mining, as introduced by Kohlenbach in the 1990s. In addition, some bounds are obtained via the Lagrangian interpolation formula as extended through the use of Schur polynomials to cover the case when… CONTINUE READING