首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到19条相似文献,搜索用时 46 毫秒
1.
刘三阳  盛宝怀 《数学进展》2002,31(5):443-450
Lw^p空间中引入了一种K-泛函并由此建立了一种以第一类Chebyshev多项多的零点为结点的三种修正高阶Hermite插值及一种修正的高阶Hermite-Fejer插值多项在Lw^p空间中逼近的正逆定理。  相似文献   

2.
一类插值多项式的导数逼近   总被引:1,自引:0,他引:1  
本给出了以雅可比多项式的零点作为插值节点的一类插值多项式Bn(f;x)的导数逼近具有一阶连续导数的函数的收敛阶。并且指出limn→∞B′n(f;-1)≠f′(-1)。  相似文献   

3.
4.
本文首先证明了二个Mareinkewicz-Zygmund型不等式,然后将它们应用到一类新的高阶拟Hermite-Fejer插值问题上,得到了该插值问题的一致及加权平均收敛性和逼近阶.此外,文中还得到了该插值一种典型情况时的点态逼近阶.  相似文献   

5.
三元重心Thiele型混合有理插值   总被引:1,自引:0,他引:1  
有理插值比多项式插值有更好的近似,但有理插值一般很难控制极点的产生.基于Thiele型连分式插值与重心有理插值,构造三元重心Thiele型混合有理插值,当选取适当的权后能避免部分极点的产生.文章最后通过数值例子验证了这种方法的正确性和有效性.  相似文献   

6.
已知结点处的函数值和一阶导数值,给出了构造一类二次分形插值函数的方法.不同于仿射分形插值函数,得到的插值函数具有可微性,并讨论分形插值函数的微积分运算,最后给出一个构造例子.  相似文献   

7.
一类带参数的有理三次三角Hermite插值样条   总被引:1,自引:0,他引:1  
谢进  檀结庆  刘植  李声锋 《计算数学》2011,33(2):125-132
给出一种带有参数的有理三次三角Hermite插值样条,具有标准三次Hermite插值样条相似的性质.利用参数的不同取值不但可以调控插值曲线的形状,而且比标准三次Hermite插值样条更好地逼近被插曲线.此外,选择合适的控制点,该种插值样条可以精确表示星形线和四叶玫瑰线等超越曲线.  相似文献   

8.
In this paper we study a class of multivariate Hermite interpolation problem on 2~d nodes with dimension d ≥ 2 which can be seen as a generalization of two classical Hermite interpolation problems of d = 2. Two combinatorial identities are firstly given and then the regularity of the proposed interpolation problem is proved.  相似文献   

9.
何兴康  刘俊生 《大学数学》2012,28(3):107-110
给出一种基于商的形式的Lagrange与Hermite插值公式及其证明,同时还给出了两个相关的不等式.  相似文献   

10.
张旭  吴嘎日迪 《应用数学》2018,31(1):237-242
在Orlicz空间内研究问题是函数逼近论研究方向里的重要分支之一.插值逼近问题有着深远的理论意义和广泛的应用前景.本文在连续函数空间和L_p空间内研究插值逼近方法的基础上,研究一种Lagrange线性组合插值算子和Hermite插值算子在Orlicz空间内的逼近问题,利用连续模,Holder等式,Hardy-Littlewood极大函数,给出两类插值的逼近度估计,所得的结果更精确于前人的同类结果.  相似文献   

11.
General interpolation formulae for barycentric interpolation and barycentric rational Hermite interpolation are established by introducing multiple parameters,which include many kinds of barycentric interpolation and barycentric rational Hermite interpolation. We discussed the interpolation theorem, dual interpolation and special cases. Numerical example is given to show the effectiveness of the method.  相似文献   

12.
    
The linear barycentric rational collocation method for solving heat conduction equation is presented. The matrix form of discrete heat conduction equation by collocation method is also obtained. With the help of convergence rate of the barycentric interpolation, the convergence rate of linear barycentric rational collocation method for solving heat conduction equation is proved. At last, several numerical examples are provided to validate the theoretical analysis.  相似文献   

13.
本文给出高阶 Herm ite- Fejér型内插的一个性质  相似文献   

14.
         下载免费PDF全文
1 IntroductionThis paper deals with the uniform collvergence of truncated Hermte illterpolatioll oll anarbitrary systelll of 11odes. Tl1e mean collvergellce of trllllcated Herntite interpolation oll a11arbitrary syste12l of 1lodes 1las been st11died recently by tlle al1t11or[31. The converge11ce oftruncated Hern1ite illterpolatiou on tl1e zeros of the Jacobi polynontials is discussed in both tlleweigl1ted LP and the unfform norm by P. Vertesi and Y. X.[61.First we iutroduce some defi11itio…  相似文献   

15.
本文给出了以雅可比多项式的零点作为插值节点的一类插值多项式 Bn( f ;x)的导数逼近具有一阶连续导数的函数的收敛阶 .并且指出 limn→∞ Bn′( f;-1 )≠f′( -1 ) .  相似文献   

16.
    
In 1988 the second author presented experimentally well-conditioned linear rational functions for global interpolation. We give here arrays of nodes for which one of these interpolants converges exponentially for analytic functions

  相似文献   


17.
    
The criteria of convergence, including a theorem of Grűnwald-type, and the rate of convergence in terms of the modulus ωφ(f, t) of Ditzian and Totik for truncated Hermite interpolation on an arbitrary system of nodes are given.  相似文献   

18.
In this paper, we study the explicit representation and convergence of (0, 1;0)-interpolation on infisite interval, which means to determine a polynomial of degree ≤ 3n - 2 when the function values areprescribed at two set of points namely the zeros of Hn(x) and H′n (x) and the first derivatives at the zerosof H′n(x).  相似文献   

19.
An improvement of the iterative methods based on one point iteration function, with or without memory, using n points with the same amount of information in each point and generated by the inverse polynomial interpolation is given. The adaptation of the strategy presented here gives a new iteration function with a new evaluation of the function which increases the local order of convergence dramatically. This method is generalized to r evaluations of the function. This method for the computation of solutions of nonlinear equations is interesting when it is necessary to get high precision because it provides a lower cost when we use adaptive multi-precision arithmetics. AMS subject classification 65H05  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号