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arXiv:0709.2729 [math.CA]AbstractReferencesReviewsResources

Polynomial Approximation and $ω^r_φ(f,t)$ Twenty Years Later

Z. Ditzian

Published 2007-09-17Version 1

About twenty years ago the measure of smoothness $\omega ^r_\phi (f,t)$ was introduced and related to the rate of polynomial approximation. In this article we survey developments about this and related concepts since that time.

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