N值随机变量序列的AEP型极限及若干强偏差定理

设{X_n,n≥1}是在S={1,2,…,N}中取值的随机变量序列,其分布为p(x_1,…,x_n),liminf[P(X_1,…,X_n)]~(1/n)与limsup[p(X_1,…,X_n)]~(1/n)称为AEP型极限。利用这些极限该文得到{X_n,n≥1}的若干强偏差定理,即一类用不等式表示的强极限定理。     

任意N值随机变量序列关于m阶非齐次马氏链的一类小偏差定理

设{Xn,n≥0}为定义在概率空间(Ω,F,P)上在{1,2,…,N}中取值的随机变量序列.设Q为F上的另一概率测度,并且{Xn,n≥0}在Q下为m阶非齐次马氏链.设h(PIQ)为P关于Q相对于{Xn}的样本散度率距离.该文首先研究{Xn,,n≥0}关于m阶非齐次马氏链的m+1元函数平均值的一类小偏差定理.作为推论,得到了{Xn,n≥0}关于m阶非齐次马氏链状态出现频率和熵密度的一类小偏差定理.最后,得到了m阶非齐次马氏链的若干强大数定律和Shannon-McMillan定理.     

关于Dini定理

关于函数序列或函数级数的一致收敛性判别准则 ,我们熟知的有 M判别法 ,Abel定理及Dirichlet定理 .在作者的《数学分析》(下册 P95 ,高等教育出版社 ,1 995年 )中还介绍了 Dini定理 ,以下称之为第一 Dini定理 .第一 Dini定理　设 [a,b] R是一有界闭区间 , n∈N,fn∶ [a,b]→R是一连续函数且满足下述条件 :1 )函数序列 { fn}是单调的 ,即 n∈ N ,fn≤ fn+ 1或 n∈ N ,fn≥ fn+ 1.2 )函数序列 { fn}在 [a,b]上逐点收敛于一连续函数 f :[a,b]→ R ,那末函数序列 { fn}在 [a,b]上一致收敛于函数 f.注意 ,上述条件 1 )中的单调性是指函数…     

任意随机变量序列泛函的强极限定理(Ⅱ)

当{Xn，n≥0}是任意随机变量序列，fn(x0，…，xn)(n≥1)是R^n 1上有界Borel可测函数时，利用鞅的理论，建立了泛函序列{fn(X0，…，Xn)，n≥1)的强极限定理，作为推论，得出了关于任意随机变量序列到达某些Borel可测集的频率与条件概率之间的关系．     

随机幂级数与α-Bloch函数

本文考虑随机幂级数:f(z,ω)=sum from n=0 to ∞ a_n e~(iω_n)z~n (1.1)其中 a_n≥0(n=0,1,…),{ω_n}是概率空间(Ω,(?),P)上的 steinhaus 序列。我们给出了f(z,ω)a.s.属于 α-Bloch 函数类(?)~α,(?)_0~α的条件,当α=1时,得出[1]中相应的结果。     

任意二进信源相对熵密度的若干性质

设(X_n)_(n>1)是取值于{0,1}的二值随机变量序列,本文讨论它的相对熵密度(f_n)_(n≥1)的极限性质,并用此极限性质给出了(x_n)_(n≥1)服从强大数定律的一个充分条件。     

可交换随机变量序列的随机极限定理

本文讨论了可交换随机变量序列{X_n:n≥1}的极限定理,得到了可交换随机变量序列的随机强大数律及加权和定理,并推广了文[4]中的结果.     

重尾平稳序列的大偏差

本文给出了一类重尾的随机变量序列{Xn,n≥1}的部分和Sn=∑i=1 n Xi与随机和S(t)=∑i=1^N(t) Xi的大偏差结果其中{N(t),t≥)}是一族非负整值的随机变量，{Xn,n≥1}是非负的平稳过程，并且与{N(t),t≥0}独立。本文将独立同分布情形的结果掖到了平稳相依的情形。     

独立重尾随机变量随机和的大偏差估计

本文研究了一类独立重尾随机变量随机和S（t)∧=∑k=1^N(t)Xk,t≥0的大偏差概率，其中{N(t),t≥0}是一放大晨负整数值随机变量；{Xn,n≥1}是非负，独立随机变量序列，并与{N(t),t≥０}独立。本文的结果将{Xn,n≥１}为独立同分布情形推广到了独立不同分布情形。     

关于随机变量加权和的强收敛性注记

设{X,;n≥1}为独立同分布随机序列,{a_(xi);1≤i≤K_n,↑~∞,n≥1}为权系数序列。本文给出三组sum from i=1 to K_n(a_(ai)X_i→0a.s.充分条件。同时,还讨论加权和的完全收敛性,我们的条件比[3]弱。     

A REPRESENTATION FORMULA RELATED TO SCHR(O)DINGER OPERATORS

Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.     

CONTENTS OF VOLUME 30

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Instructions for contributions

正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with     

Journal of Mathematical Research with Applications Guide for Authors

正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics.     

Staircase transportation problems with superadditive rewards and cumulative capacities

A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6].     

Laminations minimales résiduellement à 2 bouts

Résumé On décrit toutes les feuilles des laminations minimales dont un ensemble résiduel de feuilles ont 2 bouts.      

Best approximation by downward sets with applications

We develop a theory of downward sets for a class of normed ordered spaces. We study best approximation in a normed ordered space X by elements of downward sets, and give necessary and sufficient conditions for any element of best approximation by a closed downward subset of X. We also characterize strictly downward subsets of X, and prove that a downward subset of X is strictly downward if and only if each its boundary point is Chebyshev. The results obtained are used for examination of some Chebyshev pairs （W,x）, where ∈ X and W is a closed downward subset of X     

Boundedness of multilinear operators on weighted herz type spaces

In this paper, the author establishes the boundedness of multilinear operators on weighted Herz spaces and Herz-type Hardy spaces. The author also obtains their weak estimates on endpoints. As a special case, the conclusions may lead to the weighted estimates for multilinear Calderon-Zygmund operators.     

THE EXACT CONVERGENCE RATE AT ZERO OF LAGRANGE INTERPOLATION POLYNOMIAL TO |x|α

In this paper we present a generalized quantitative version of a result due to M. Revers concerning the exact convergence rate at zero of Lagrange interpolation polynomial to f(x) = |x|α with on equally spaced nodes in [-1, 1].