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Hermite—Fejer型插值算子的平均收敛
Mean Convergence of Hermite—fejer Type Interpolatons
【摘要】 以第二类多项式Un(x)的原点为插值节点的Hermite—Fejer型插值算子Hi,n(f)(i=11,12,…,16)并非对任何[-1,1]上的连续函数f(x)都能在[0,1]上一致收敛于f(x)。本文讨论了这些算子在区间[-1,1]上关于权函数(1-x2)1/2的平均收敛问题。
【Abstract】 Let H_ψ (f,x) (i=11,12,...,16) are the Hermite—Fejer type interpolations bassed on the zeros of Tchebyshev polynomial of the second kind U_n (x). In this paper the main results are following theorems:Theorem 1. For f(x)∈Lipa, 0<p<3, i=11,12,let Theorem 2.For any f(x)∈C[-1,1],0<p<3,We have where ω(O)=ω(f,x)is the modulus of continuity of f(x).Theorem 3.For p=3 and f(x)≡x,We have (i=11,12,…,16).
【关键词】 чебъщев多项式;
hermile—Fejér型插值算子;
函数类C_[-1,1];
Lipa;
连续模;
【Key words】 Tchebyshev Polynomial; Hermite—Fejer type interpolation operaters; class of function; Modulus of continuity;
【Key words】 Tchebyshev Polynomial; Hermite—Fejer type interpolation operaters; class of function; Modulus of continuity;
【基金】 浙江省自然科学基金
- 【文献出处】 绍兴师专学报 ,Journal of Shaoxing University , 编辑部邮箱 ,1991年Z1期
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