关于近乎Hermite—Fejer有理型插值逼近

On the Interpolatory Approximation of Almost Hermite-Fej■r Rational Type

给出以Ｊａｃｏｂｉ多项式的零点为结点的近乎Ｈｅｒｍｉｔｅ—Ｆｅｊｅｒ有理型插值算子，并研究了它的逼近性，得出了精确的点态逼近阶。

In this paper, we discuss two interpolatory operators of almost Hermite Fejer rational type based on the zeros of Jacobi polynomials J.and obtain the precise pointwise orders of approximation