Simultaneous approximation and interpolation of functions on continua in the complex plane

Abstract

We construct polynomial approximations of Dzjadyk type (in terms of the k-th modulus of continuity, $k\ge 1$) 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 $e^{-c{n}^{\alpha }}$ strictly inside E, where c and $\alpha$ are positive constants independent of the degree n of the approximating polynomial.

21 page; submitted to J. Math. Pures Appl