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This is a survey of some recent results concerning polynomial inequalities and polynomial approximation of functions in the complex plane. The results are achieved by the application of methods and techniques of modern geometric function theory and potential theory. MSC: 30C10, 30C15, 41A10

We construct polynomial approximations of Dzjadyk type (in terms of the k -th modulus of continuity, k ≥ 1 ) for analytic functions defined on a continuum E in the complex plane, which simultaneously interpolate at given points of E . Furthermore, the error in this approximation is decaying as e−cn α strictly inside E , where c and α are positive constants… (More)

- Vladimir Andrievskii
- Journal of Approximation Theory
- 2009

Abstract. We extend the results on the uniform convergence of Bieberbach polynomials to domains with certain interior zero angles (outward pointing cusps), and show that they play a special role in the problem. Namely, we construct a Keldysh-type example on the divergence of Bieberbach polynomials at an outward pointing cusp and discuss the critical order… (More)

- Vladimir Andrievskii
- Journal of Approximation Theory
- 2002

We use the following standard terminology. We denote by Denjoy domain an open subset Ω of the complex plane C whose complement E := C \ Ω, where C := C ∪ {∞}, is a subset of R := R ∪ {∞}, where R is the real axis (see [13]). Throughout the paper we rely on the following assumption. Each point of E (including the point at infinity) is regular for the… (More)

- Vladimir Andrievskii
- Journal of Approximation Theory
- 2005

We study the uniform approximation of the canonical conformal mapping, for a Jordan domain onto the unit disk, by polynomials generated from the partial sums of the Szegő kernel expansion. These polynomials converge to the conformal mapping uniformly on the closure of any Smirnov domain. We prove estimates for the rate of such convergence on domains with… (More)

- Vladimir Andrievskii, Hans-Peter Blatt
- Journal of Approximation Theory
- 2011

- Vladimir Andrievskii
- Journal of Approximation Theory
- 2012