Rational approximation on infinite intervals
We describe some approximation properties of polynomials of degree at most 2n with weight (1 + x(2))(-n) on the real line and of polynomials of degree at most n with weight (1 + t)(-n) on the interval (0, infinity). This article is intended to summarize the results of a systematic investigation; most of the results have very recently appeared elsewhere, or will soon appear. (C) 2004 Elsevier Ltd. All rights reserved.
rational approximation weighted polynomials simultaneous approximation