共查询到20条相似文献,搜索用时 984 毫秒
1.
本文给出了巴拿赫空间中线性差分方程的两个多项式二分性概念, 使其在相应空间中的范数的增长速度不快于指数型增长. 并用实例阐释了相关概念之间的关系. 借助于指数二分性的研究方法讨论了多项式二分性的特征, 所得结论推广了指数稳定性及指数二分性中的一些已有结果. 相似文献
2.
对于具有等距分布插值结点的三角多项式,借助广义的Minkowski不等式在Orlicz空间内建立了由三角多项式逼近的渐近等式.并对于Orlicz空间内不同的函数类给出不同的结果. 相似文献
3.
《数学的实践与认识》2017,(17)
提出了一种利用空间信息的分层抽样方法.首先,利用多项式回归模型估计各坐标之间的空间相关系数,然后对空间相关系数矩阵进行谱聚类分析,最终依据上述结果对总体进行分层.通过与其他抽样方法的比较证明提出的基于网络聚类的空间分层方法具有比较优良的分层效果. 相似文献
4.
5.
6.
我们研究Steenrod代数上的多项式代数能否实现为拓扑空间的上同调环的问题。根据Adams和Hubbuck的思想,我们应用K-理论及Adams运算来研究上述问题,并得到本文的主要结果——定理2.4.它推广了Hubbuck和Wilkerson的结果。 相似文献
7.
利用广义Lucas多项式L n(x,y)的性质,通过构造组合和式T n(x,y;tx2),结合Bernoulli多项式的生成函数和Euler多项式的生成函数,采用分析学中的方法,得到两个有关L2n(x,y)的恒等式.并从这一结果出发,得到了两个推论,推广了相关文献的一些结果. 相似文献
8.
Fillmore在[1]中得到一个定理:设A,T是Banach空间X上的线性变换,A有界,若Lat(A) Lat(T)且AT=TA,则T是A的多项式.在本文里,以此作为引理,讨论了Banach空间上可逆线性变换A在什么情况下,A-1可表示为A的多项式.本文最主要的结论是定理3.4:设X是Banach空间,A是X上的有界线性变换,且可逆,则A-1是A的多项式当且仅当A-1是A的局部多项式. 相似文献
9.
先引入了由一列Orlicz空间生成的Ba空间(LMBa)的定义,然后用分数阶α的连续模给出一类广义插值在LBMa空间中逼近阶. 相似文献
10.
利用Orlicz空间内有关不等式技巧在Orlicz空间内研究了用三角多项式的倒数逼近周期可微函数的问题.得到了一个逼近定理及其推论. 相似文献
11.
Emil Grosswald 《Proceedings Mathematical Sciences》1987,97(1-3):75-84
A heuristic method is presented to determine the number of primesp ≤x, represented by an irreducible polynomialf(n), without non-trivial fixed factor (f(y)<∈Z[y]; n∈Z. The method is applied to two specific polynomials and the results are compared with those of the heuristic approach of Hardy
and Littlewood. 相似文献
12.
Francisco Luquin 《Mathematische Nachrichten》1996,181(1):261-275
Some results of A.O. Gelfond concerning monic polynomials of least deviation (uniform) from zero together with their derivatives are extended to certain Lp - norms and to several variables. As an application we extend a recent result of Xiaoming Huang to functions f∈C(n)n)([?1, 1]) which satisfy f(n)(x)≥1. 相似文献
13.
We show that a 2-homogeneous polynomial on the complex Banach space c
0
l
2
i
) is norm attaining if and only if it is finite (i.e, depends only on finite coordinates). As the consequence, we show that
there exists a unique norm-preserving extension for norm-attaining 2-homogeneous polynomials on c
0(l
2
i
).
The second author was supported by FAPESP, Brazil, Research Grant 01/04220-8. 相似文献
14.
André Draux 《Numerical Algorithms》1996,11(1):143-158
From some results concerning the formal orthogonal polynomials, already proved in [5], we develop new properties of generalized adjacent polynomials which correspond to a change in the weight function. A new structure of the singular blocks is given. These results have a direct application to Lanczos methods, theG and -algorithms. 相似文献
15.
Arne Winterhof 《Designs, Codes and Cryptography》2002,25(1):63-72
Recently, Coppersmith and Shparlinski proved several results on the interpolation of the discrete logarithm in the finite prime field
by polynomials modulo p and modulo p-1, respectively. In this paper most of these results are extended to arbitrary
. 相似文献
16.
Abedallah Rababah Mohammed Al-Refai 《Numerical Functional Analysis & Optimization》2013,34(5-6):660-673
In this paper, we give a new, simple, and efficient method for evaluating the pth derivative of the Jacobi polynomial of degree n. The Jacobi polynomial is written in terms of the Bernstein basis, and then the pth derivative is obtained. The results are given in terms of both Bernstein basis of degree n ? p and Jacobi basis form of degree n ? p and presented in a matrix form. Numerical examples and comparisons with other well-known methods are presented. 相似文献
17.
I. I. Sharapudinov 《Mathematical Notes》1997,62(4):501-512
Suppose that 0<δ≤1,N=1/δ, and α, ga≥0, is an integer. For the classical Meixner polynomials
orthonormal on the gird {0, δ, 2δ, ...} with weight ρ(x)=(1-e
−δ)αг(Nx+α+ 1)/г(Nx+1), the following asymptotic formula is obtained:
. The remainderv
n,N
α
(z) forn≤λN satisfies the estimate
where Λ
k
α
(x) are the Laguerre orthonormal polynomials. As a consequence, a weighted estimate, for the Meixner polynomial
on the semiaxis [0, ∞) is obtained.
Translated fromMatematicheskie Zametki, Vol. 62, No. 4, pp. 603–616, October, 1997.
Translated by N. K. Kulman 相似文献
18.
Jet Wimp 《Numerical Algorithms》2000,24(1-2):179-193
In this paper we investigate Hankel determinants of the form
, where c
n
(t) is one of a number of polynomials of combinatorial interest. We show how some results due to Radoux may be generalized,
and also show how “stepped up” Hankel determinants of the form
may be evaluated.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
19.
Permutation polynomials of the form 总被引:1,自引:1,他引:0
Jin Yuan Cunsheng Ding Huaxiong Wang Josef Pieprzyk 《Finite Fields and Their Applications》2008,14(2):482-493
Recently, several classes of permutation polynomials of the form (x2+x+δ)s+x over have been discovered. They are related to Kloosterman sums. In this paper, the permutation behavior of polynomials of the form (xp−x+δ)s+L(x) over is investigated, where L(x) is a linearized polynomial with coefficients in . Six classes of permutation polynomials on are derived. Three classes of permutation polynomials over are also presented. 相似文献
20.
Diego Dominici 《The Ramanujan Journal》2008,15(3):303-338
We analyze the Krawtchouk polynomials K
n
(x,N,p,q) asymptotically. We use singular perturbation methods to analyze them for N→∞, with appropriate scalings of the two variables x and n. In particular, the WKB method and asymptotic matching are used. We obtain asymptotic approximations valid in the whole domain
[0,N]×[0,N], involving some special functions. We give numerical examples showing the accuracy of our formulas.
相似文献