共查询到16条相似文献,搜索用时 62 毫秒
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二元Thiele型向量连分式逼近的余项公式 总被引:2,自引:1,他引:2
文[1]利用向量的Samelson逆变换V~(-1)=V/|V|~2得到了向量函数V(x,y)的第(n,m)阶连分式逼近的表达式 相似文献
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向量连分式逼近与插值 总被引:18,自引:1,他引:18
§!.向量连分式展开式 给定不同实数组成的序列∏_x~∞={x_0,x_1,x_2,…}和由对应的有限向量组成的序列?_z~∞={V~((0)),V~((1)),V~((2)),…},其中V~((i))=V(x_i),V~((i))∈C~d.向量的Samelson逆变换定义为 V~(-1)(x)=V~*(x)/|V(x)|~2,V~*是V的共轭向量.(1) 定义1.?_l[x_0x_1…x_l]称为V(x)的第l阶反差商,其中 相似文献
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基于Thiele型连分式构造求积公式,这类求积公式能再生由Thiele型连分式前三项渐近式的线性组合所表示的任意有理函数,接着算出求积余项,并推导出分母在给定区间上无零点的充分条件.更进一步,通过等分给定区间,构造相应的复化求积公式,并算出求积余项.研究表明,在若干条件满足的前提下,复化求积公式序列能一致收敛于积分真值,一些数值算例说明了这一点. 相似文献
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二元Thiele型向量有理插值 总被引:16,自引:3,他引:16
本文对二元Thiele型连分式的渐近分式施行Samelson逆变换,建立了平面矩形域上的二元向量值有理插值,所得结果是一元向量值有理插值的推广和改进. 相似文献
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我们讨论了如下形式的向量值连分式这里bn=(bn1,bn2,…,bnd)满足Samelson逆,而且an,bn1,bn2,…,bnd均为正.给出了形如(#)的向量值连分式收敛的充分和必要条件,同时给出了收敛时的截断误差估计. 相似文献
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一个分式型不等式定理及其应用的注记 总被引:5,自引:0,他引:5
读《数学通报》2 0 0 0年第 6期《一个分式型不等式定理及其应用》一文 (以下简称原文 ) ,发现有以下三处错误应予修正 .1 原文定理 1的修正原文定理 1 若ai、bi∈R ,i =1 ,2 ,… ,n ,γ≥ 2或γ <0 ,β>0 ,则∑ni=1aγibβi≥n1 -γ β·∑ni=1aiγ∑ni=1biβ(1 )原文证明的不妥之处 :“ ∑ni=1bβi- 1 ≥n- 1 β· ∑ni=1bi- β(β≥ 1或 0 <β <1 )” .其实 ,当bi>0 (i=1 ,2 ,… ,n) ,β>1时应有∑ni=1bβi- 1 ≤n- 1 β ∑ni=1bi- β.(1 )式反例 :在 (1 )式中令n =2 ,a1 =1 ,a2 =8,… 相似文献
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Zbigniew S. Szewczak 《Journal of Theoretical Probability》2009,22(1):239-255
It is shown that for sums of functionals of digits in continued fraction expansions the Kolmogorov-Feller weak laws of large
numbers and the Khinchine-Lévy-Feller-Raikov characterization of the domain of attraction of the normal law hold.
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Stefan Paszkowski 《Numerical Algorithms》2003,32(2-4):193-247
The tails of a continued fraction satisfy a bilinear recurrent equation. Transforming iteratively these tails (in a special manner) as well as these equations one may obtain finally, for a given fraction, a new, so-called diagonal continued fraction (DF) having the same value. For many important classes of continued fractions the DF has a calculable analytical form and converges qualitatively faster. Using the same method one may transform some hypergeometrical series directly into fast convergent DFs. 相似文献
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This is an expository article which contains alternative proofs of many theorems concerning convergence of a continued fraction to a holomorphic function. The continued fractions which are studied are continued fractions of the form
where {a
n
}, {b
n
} are real sequences with a
n
>0 (associated continued fractions). The proofs rely on the properties of the resolvent (–T)–1, where T is the symmetric tridiagonal operator corresponding to {a
n
} and {b
n
}, and avoid most of technical aspects of earlier work. A variety of well-known results is proved in a unified way using operator methods. Many proofs can be regarded as functional analytic proofs of important classical theorems. 相似文献
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Khrystyna Kuchmins"ka 《Acta Appl Math》2000,61(1-3):175-183
By the method of majorant fractions and equivalent transformations, the analogies of leszyski–Pringsheim criteria for two-dimensional continued fractions are obtained. 相似文献
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The Levels-Recursive Algorithm for Vector Valued Interpolants by Triple Branched Continued Fractions
Shuo Tang Xuhui Wang 《高等学校计算数学学报(英文版)》2006,15(2):137-142
1 Introduction Let Πl,m,n be a set of points in three dimensional space R3, Πl,m,n = {(xi, yj, zk), i = 0, 1, · · · l; j = 0, 1, · · · m; k = 0, 1, · · · n}. Let a d?dimensional vector vi,j,k be given at every point (xi, yj, zk) ∈ Πl,m,n and 相似文献