Kloosterman和的角度

有限域 Ｆｑ（ｑ为奇）上的 Ｋｌｏｏｓｔｅｒｍａｎ和是两个模为 ｑ１／２的共轭复数之和．这个复数的角度就称为相应的Ｋｌｏｏｓｔｅｒｍａｎ和的角度．我们在本文给出了Ｋｌｏｏｓｔｅｒｍａｎ和的角度的一些结果,改进了Ｋａｔｚ Ｎ．［１］的一些结果,也改进和推广了Ｃｏｎｒｅｙ　Ｊ．和Ｉｗａｎｉｅ Ｈ．［２］的结果．     

积分算子的n-逼近数

本文研究了积分算子ＴＫ：Ｌｑ［０，１］→Ｌｑ［０，１］，（ｑ≥１）当核 Ｋ（ｓ， ｔ）是 Ｓｏｂｏｌｅｖ空间 Ｗｐｒ（［０， １］２）中元素时ｎ－逼近数 ａｎ（ＴＫ： Ｌｑ→ Ｌｑ）的估计，并把这个估计应用于退化核方法解第二类线性Ｆｒｅｄｈｏｌｍ方程（Ｉ一ＴＫ）ｘ＝ｙ时，Ｂａｄｈｖａｌｏｖ［５］意义下最佳误差的讨论中，所得到的最佳误差之估计当ｑ＝１时，最优化了［１０］的结论．     

F_3上代数曲线的有理点个数

如果用Ｎｑ（ｇ）表示Ｆｑ上亏格为ｇ的所有光滑不可约代数曲线的Ｆｑ－有理点个数最大值，则确定Ｎｑ（ｇ）的值是一个困难问题．Ｓｅｒｒｅ确定了当ｑ＝２，１≤ｇ≤１０及ｑ＝３，１≤ｇ≤３时的全部Ｎｑ（ｇ），本文确定了ｑ＝３，４≤ｇ≤６的Ｎｑ（ｇ）值．     

有限域上具有交换图表性质的多项式

本文给出了有限域Ｆ_ｑ上满足条件ｆ（ｇ（ｘ））≡ｈ（ｆ（ｘ））的多项式ｆ（ｘ）的通解表示公式及在ｄｅｇｆ＜ｑ条件下的ｆ（ｘ）的个数计算公式，此地ｇ（ｘ）和ｈ（ｘ）是Ｆ_ｑ上给定的两个多项式，其中之一是置换多项式．这一结果推广了文献［３］的主要结果，而在ｇ（ｘ）和ｈ（ｘ）均为线性多项式的特殊情况，则分别推广了文献［１］和［２］中的主要结果．     

F_q(T)上椭圆曲线的超奇素除子

本文表明在函数域Ｋ上椭圆曲线上的超奇素除子集合Ｓ*（Ｅ）具有与数域情形不同的特性,特别对Ｋ是有理函数城Fq（Ｔ）时,在多数情形下（即ｊ（Ｅ）Ｆｑ时）,Ｓ＊（Ｅ）是有限集合．并且Ｆｑ（Ｔ）上存在椭圆曲线Ｅ（ｊ（Ｅ）Ｆｑ）,使得Ｓ＊（Ｅ）包含Ｆｑ（Ｔ）的任意素除子有限集合Ｓ．对于Ｆｑ（Ｔ）的特征为２,３,５的情形,还可以构作Ｅ,使得Ｓ＊（Ｅ）＝Ｓ．     

高维非线性K－G方程解之间的关系与N孤子解

设与Ｆｉ对应的解为共轭的正则动量为πｉ．场的正则变换ｇ：（πｉ）→（ｑ，ｐ）给出方程的一类解［ｑ（ｘ）］及诸间的关系，其中某些特解即为Ｇｉｂｂｏｎｊ和楼森岳等人几篇文章的主要结果．特别讨论了ｓＧ方程的一类解之间的递推关系，由此得到Ｎ个不同的孤子解，并分别给出３维和４维情形相应的Ｎ孤子特解．     

关于FIBONACCI数列的注记

关于ＦＩＢＯＮＡＣＣＩ数列的注记＊陈木法（北京师范大学数学系１００８７５）新近的文［１］和［２］研究了Ｆｉｂｏｎａｃｃｉ数列（简称为Ｆ数列）的一些性质，笔者发现这些结果大多容易从文［３］的两条基本性质导出．因而略作说明所谓Ｆ数列，乃是Ｆ０＝０，Ｆ１＝...     

关于有界对称域上的混合范数空间

本文研究了Ｃｎ中有界对称域Ω上的混合范数空间Ｈ（ｐ，ｑ，　）其中０＜ ｐ＜　，０＜ｑ＜　，　是正规函数，给出了Ω上全纯函数ｆ的分数导数ｆ［β］和 分数积分ｆ［β］属于（ｐ，ｑ，）的等价条件。应用这些结果，就两种情形０＜ｐ≤２， ０＜ｑ＜　和２≤ｐ＜，０＜ｑ＜ ，用全纯函数ｆ的展式中的系数，分别给出了 ｆ　Ｈ（ｐ，ｑ，）的必要条件和充分条件，并证明了多调和函数ｕ组成的混合范数空 间ｈ（ｐ，ｑ，）（０＜ｐ，ｑ＜　）是自共轭的．     

一类Reinhardt域从任一不变Kahler度量导出的解析自同胚群

把文［１］中结果推广到Ｒｅｉｎｈａｒｄｔ域Ｄ＝Ｄ（Ｋ１Ｋ２…Ｋｐ）Ｃ（１≤ｐ＜ｎ）．即证明了从域Ｄ的任一不变Ｋｈｌｅｒ度量都可以导出相同的Ａｕｔ（Ｄ）     

一个素变数丢番图不等式

本文证明了如果１＜ｃ＜２３７／２１４，则对于充分大的Ｎ和ε≥Ｎ－１／５（２３７／２１４－ｃ）＋ｖ（ｖ＞０）表达式Ｄ（Ｎ）：＝Σ｜ｐｃ１＋ｐｃ２＋ｐｃ３－Ｎ｜＜－εｌｏｇｐ１ｌｏｇｐ２ｌｏｇｐ３ 关于素变数ｐ１，ｐ２，ｐ３有渐近公式，改进了文献［１］的结果１＜Ｃ＜１．１．     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

On a class of self-similar processes with stationary increments in higher order Wiener chaoses

We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.     

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.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

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].     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.