Grünwald插值多项式对|x|的逼近度

The Approximation Rate of the Grünwald Interpolatory Polynomials to |x|

文章研究以第二类Chebyshev多项式零点为插值结点组的Grünwald插值多项式Gn(f,X;x)对|x|的逼近度,并证明其不可改进.

This paper is to study the approximation rate of the Grünwald interpolation polynomials to ｜x ｜ on the zeros of Chebyshev polynomials of the second kind, and prove that the result can＇t be improved.