Surveys in Approximation Theory (SAT)

Surveys in Approximation Theory, 3 (2007), 106-151.

Polynomial Approximation and ω_φ^r(f,t) Twenty Years Later

Z. Ditzian

Abstract. About twenty years ago the measure of smoothness ω_φ^r(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.

E-print: arXiv:0709.2729v1

Published: 16 September 2007.

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Z. Ditzian
Department of Mathematical and Statistical Sciences
University of Alberta
Edmonton, Alberta, T6G 2G1
Canada
E-mail: zditzian@math.ualberta.ca

Surveys in Approximation Theory, 3 (2007), 106-151.

Polynomial Approximation and ωφr(f,t) Twenty Years Later

Z. Ditzian

Polynomial Approximation and ω_φ^r(f,t) Twenty Years Later