## Constructive Approximation

- R. A. DeVore, G. G. Lorentz
- Springer-Verlag, Berlin
- 1993

2 Excerpts

Let D and ∂D denote the open unit disk and the unit circle of the complex plane, respectively. We denote the set of all polynomials of degree at most n with real coefficients by Pn. We denote the set of all polynomials of degree at most n with complex coefficients by Pc n. We define the truncation operator Sn for polynomials Pn ∈ Pc n of the form

@inproceedings{ErdlyiTheNO,
title={The Norm of the Polynomial Truncation},
author={Tam{\'a}s Erd{\'e}lyi}
}