一个数论函数和它的均值的计算

设 p是一个素数 ,n是任意正整数 ,函数α(n ,p)表示 p在n !标准分解式中的指数 ,本文给出了函数α(n ,p)的均值 ∑n相似文献   

关于不同因子分解的数目

设f(n)表示分解自然数n(>1)为大于1的整数因子乘积的所有方式的数目(不计因子的顺序),并设0<β<1,N(x,β)=Card{n≤x,f(n)≥n~β}.本文分别估计了N(x,β)和f(n))的值.     

Jordan函数r次方Jk^r（n）的误差项的进一步性质

设k，r分别是自然数和非零整数，Jk(n)是Jordan函数．以E(x；k，r)表示和式∑n≤xJk^r(n)的渐近公式中的误差项，本文研究了E(x；k，r)的某种加权平方积分均值．     

一个特殊的Gauss和以及它的上界估计

设p是一个奇素数.对任意满足1≤a≤p-1的整数a,存在唯一的整数1≤a≤p-1,使得a·a≡1 mod p成立.设N(p)表示区间1≤a≤p-1中所有满足条件a与a具有相反奇偶性的a的集合.本文利用解析方法以及广义Kloosterman和的性质研究一类特殊的Gauss和∑。∈N(p)x(a)e(ma/p)的估计问题,给出一个较强的上界估计,其中e(x)=e~(2πix),(m,p)=1,且x是模p的任意特征.     

关于Euler e-函数和n的指数互素因子

对于任意正整数n,设n=pα11pα22…pαrr为n的标准素因数分解式,如果对于de n且de=pβ11pβ22…pβrr有(βi,αi)=1(i=1,2,…,k),则称de为n的指数互素因子.本文利用初等及解析方法研究了正整数n的所有de因子的求和及求积的计算问题,获得了两个有趣的计算公式;同时还研究了n的所有de因子个数函数,即Eu ler e函-数φe(n)的均值性质,并给出了一个较强的渐近公式.     

关于广义Kloosterman和的均值（英文）

设q≥2为整数,x为模q的Dirichlet特征,m,n为任意整数.广义Kloosterman和K(m,n,x;q)的定义为■其中∑'表示对与q互素的所有整数a求和,e(y)=e~(2πiy),ā是a关于模q的乘法逆,满足aā≡1(mod q)与1≤ā≤q.本文研究了均值■并给出了一些恒等式.     

整数的多项式表示、性质及应用

对给定的一个p进制的n+1位正整数N,其各位上数字分别记为a_1,a_2,…a_(n+1),则此数可表示为: N=a_1p~n+a_2p~(n-1)+…+a_np+a_(n+1)其中a_i是整数,0≤a_i≤p-1 (i=1,2,…,n+1),且a_1≠0。当p为某一素数时,整数N、a_i、n及p之间具有下面性质:     

几个不等式的简证

《数学通讯》(教师版)2006年上年度刊登了一组关于不等式研究的专题文章,笔者拜读之后受益匪浅,笔者探究发现其中的几个不等式更加简捷的证明方法,现写出来,供读者参考.例1[1]设ai>0,pi≥0(i=1,2,…,n),且p1 p2 … pn=1,则1n∑i=1piai≤n∏i=1aipi≤n∑i=1piai(1)这是文[1]对文[2]证明的如下一个不等式的逆向不等式:设ai>0,pi≥0,(i=1,2,…,n)且p1 p2 … pn=1.则n∑i=1piai≥n∏i=1aipi(2)文[1]通过构造函数,考察函数的凸性,然后用数学归纳法证明了(1)式.其实,有了(2)式,(1)式的证明便唾手可得,不必绕道而行.事实上,由(2)式∑ni=1piai=∑ni=…     

Smarandache双阶乘对偶函数的三次均值及加权均值

利用初等方法研究了Smarandache双阶乘对偶函数S^(**)(n)的三次均值及其加权均值,给出了∑_(n≤x)(S(**)(n)的三次均值及其加权均值,给出了∑_(n≤x)(S^(**)(n))(**)(n))³,∑_(n≤x)n3,∑_(n≤x)n^k(Sk(S^(**)(n))(**)(n))³及∑(n≤x(S3及∑(n≤x(S^(**)(n)(**)(n)³/n3/n^k)的渐近公式,得到了Sk)的渐近公式,得到了S^(**)(n)新的分布性质,补充了有关文献的结论.     

一类特殊Beatty序列中的素因子问题

研究了数论函数Ω和ω取值于一类特殊的非齐次Beatty序列[αn+β](n=1,2,…)的问题.特别地,证明了渐近公式∑ω([αn+β)=N log log N+O(N(log log N) )以及∑(一1)Ω(αn+β)=O( n/(log N 1/2)),其中α,β∈R,n∈Z+,α>0是型为1的无理数,Ω(k)和ω(k)表示整数k(≠0)的素因子个数(Ω记重数,ω不计重数).     

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.     

Qualitative Analysis of Bifurcating Solutions in the Lengyel-Epstein Model

One of the most fundamental problems in theoretical biology is to explain the mechanisms by which patterns and forms are created in the＇living world. In his seminal paper ＂The Chemical Basis of Morphogenesis＂, Turing showed that a system of coupled reaction-diffusion equations can be used to describe patterns and forms in biological systems. However, the first experimental evidence to the Turing patterns was observed by De Kepper and her associates（1990） on the CIMA reaction in an open unstirred reactor, almost 40 years after Turing＇s prediction. Lengyel and Epstein characterized this famous experiment using a system of reaction-diffusion equations. The Lengyel-Epstein model is in the form as follows     

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.     

(0,1 ;0)-INTERPOLATION ON INFINITE INTERVAL (-∞, +∞)

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

CONTENTS OF VOLUME 30

正~~     

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].