NA阵列加权乘积和的完全收敛性

设{X_(ni):1≤i≤n,n≥1}为行间NA阵列,g(x)是R~+上指数为α的正则变化函数,r>0,m为正整数,{a_(ni):1≤i≤n,n≥1}为满足条件(?)|a_(ni)|=O((g(n))~1)的实数阵列,本文得到了使sum from n=1 to ∞n~(r-1)Pr(|■multiply from j=1 to m a_(nij) X_(nij)|>ε)<∞,■ε>0成立的条件,推广并改进了Stout及王岳宝和苏淳等的结论。     

E^n中Euler不等式的推广

设 n 维欧氏空间 E~n 中 n 维单形 Ω 的外接球半径为 R,内切球半径为 r,M.S.Klamkin 获得 E~n 中之 Euler 不等式:R≥nr.本文给出 E~n 中 Euler 不等式的下述几个推广:(i)R~2≥δ_nn~2r~2+(?);(ii)R~2≥(?)/2(1+δ_n)n~2r~2+(1/2)(?);(iii)R~2≥n~2r~2+(1/4)(?)其中 I、O、G 分别为单形Ω的内心、外心与重心,δ_n=(?)[1-((ρ_(ij)-ρ_(jk))~2(ρ_(jk-ki))~2(ρ_(ki)-ρ_(ij))~2)/(ρ_(ij)ρ_(jk)ρ(k(?)))]~((-1)/n(n~2-1))≥1,ρ_(ij)=(?)(1≤i相似文献   

关于一类中心循环的有限P-群的自同构群

确定了一类中心循环的有限p-群G的自同构群.设G=X_3(p~m)~(*n)*Z_(p~(m+r)),其中m≥1,n≥1和r≥0,并且X_3(p~m)=x,y|x~(p~m)=y~(p~m)=1,[x,y]~(p~m)=1,[x,[x,y]]=[y,[x,y]]=1.Aut_nG表示Aut G中平凡地作用在N上的元素形成的正规子群,其中G'≤N≤ζG,|N|=p~(m+s),0≤s≤r,则(i)如果p是一个奇素数,那么AutG/Aut_nG≌Z_(p~((m+s-1)(p-1))),Aut_nG/InnG≌Sp(2n,Z_(p~m))×Z_(p~(r-s)).(ii)如果p=2,那么AutG/Aut_nG≌H,其中H=1(当m+s=1时)或者Z_(2~(m+s-2))×Z_2(当m+s≥2时).进一步地,Aut_nG/InnG≌K×L,其中K=Sp(2n,Z_(2~m))(当r0时)或者O(2n,Z_(2~m))(当r=0时),L=Z_(2~(r-1))×Z_2(当m=1,s=0,r≥1时)或者Z_(2~(r-s)).     

关于亚纯函数族■的唯一性

§1.引言设f(z)是开平面内非常数的亚纯函数,α为复数,λ为正整数,我们用E(α,f)表示f(z)-α的0点集合,用E_(?)(α,f)表示f(z)-α的重级不高于λ的0点集合,在上述集合中,每个0点仅计一次。有时我们也把E(α,f),E_(λ))(α,f)及E(b,f~~(k)),E_λ(b,f~(k))分别简记为E(α),E_(λ))(α)及E~((k))(b),E_(λ))~((k))(b),其中b为复数,k为正整数。在本文中,我们设F表示满足条件δ(0)=δ(∞)=1的开平面内非常数亚纯函数族。显然F中的函数均为超越亚纯函数(?     

超图的r-截口

设H=(X;E_1,E_2,…,E_m)是一个超图,H的r-截口,记作H_((r)),定义为(X;ε_((r)),其中ε_((r))={F;FX,|≤| F |≤r,且存在E_i使FE_i}.对任一超图H,H_((r))唯一存在,但并非任一秩不超过r的超图是某个超图的r-截口。本文给出了以给定超图为     

γ-可图序列与γ-完全子图

一个r-图是一个无环的无向图,其中任何两个顶点之间至多被r条边连接.一个m+1个顶点的r-完全图,记为K_(m+1)^((r)),是一个m+1个顶点的r-图,其中任何两个顶点之间恰好被r条边连接.一个非增的非负整数序列π=(d_1,d_2,…,d_n)称为是r-可图的如果它是某个n个顶点的r-图的度序列.一个r-可图序列π称为是蕴含(强迫)K_(m+1)((r)),是一个m+1个顶点的r-图,其中任何两个顶点之间恰好被r条边连接.一个非增的非负整数序列π=(d_1,d_2,…,d_n)称为是r-可图的如果它是某个n个顶点的r-图的度序列.一个r-可图序列π称为是蕴含(强迫)K_(m+1)^((r))可图的如果π有一个实现包含K_(m+1)((r))可图的如果π有一个实现包含K_(m+1)^((r))作为子图(π的每一个实现包含K_(m+1)((r))作为子图(π的每一个实现包含K_(m+1)^((r))作为子图).设σ(K_(m+1)((r))作为子图).设σ(K_(m+1)^((r)),n)(τ(K_(m+1)((r)),n)(τ(K_(m+1)^((r)),n))表示最小的偶整数t,使得每一个r-可图序列π=(d_1,d_2,…,d_n)具有∑_(i=1)((r)),n))表示最小的偶整数t,使得每一个r-可图序列π=(d_1,d_2,…,d_n)具有∑_(i=1)ⁿ d_i≥t是蕴含(强迫)K_(m+1)n d_i≥t是蕴含(强迫)K_(m+1)^((r))-可图的.易见,σ(K_(m+1)((r))-可图的.易见,σ(K_(m+1)^((r)),n)是Erds等人的一个猜想从1-图到r-图的扩充且τ(K_(m+1)((r)),n)是Erds等人的一个猜想从1-图到r-图的扩充且τ(K_(m+1)^((r)),n)是经典Turan定理从1-图到r-图的扩充.本文给出了蕴含K_(m+1)((r)),n)是经典Turan定理从1-图到r-图的扩充.本文给出了蕴含K_(m+1)^((r))的r-可图序列的两个简单充分条件.此两个条件包含了Yin和Li在[Discrete Math.,2005,301:218-227]中的两个主要结果和当n≥max{m((r))的r-可图序列的两个简单充分条件.此两个条件包含了Yin和Li在[Discrete Math.,2005,301:218-227]中的两个主要结果和当n≥max{m²+3m+1-[(m2+3m+1-[(m²+m)/r],2m+1+[m/r]]}时,σ(K_(m+1)2+m)/r],2m+1+[m/r]]}时,σ(K_(m+1)^((r)),n)之值.此外,我们还确定了当n≥m+1时,τ(K_(m+1)((r)),n)之值.此外,我们还确定了当n≥m+1时,τ(K_(m+1)^((r)),n)之值.     

F(p,q,s)空间到Bloch型空间的广义积分算子的差分

设g,φ∈H(D),φ(D)D,n是正整数,定义广义积分算子为I_(g,φ)~((n))f(z)=∫_0~zf~((n))(φ(ζ))g(ζ)dζ.本文给出了F(p,q,s)空间到Bloch型空间的广义积分算子的差分的有界性和紧性的充要条件.     

单位上三角矩阵群的注记

记Tr_1(n,Z)是整数环Z上对角线元素全是1的全体上三角矩阵组成的群,k_(ij)(1≤i相似文献   

分担值与具有重零点的亚纯函数正规族

主要证明了:设k≥2是一个正整数,M是一个正数,c是一个非零有穷复数.F是区域D内的一族亚纯函数,其中每个函数的零点的重数至少是k.若对于F中的任意函数f,f(z)=0f^((k))(x)=0,f((k))(x)=0,f^((k))(z)=c■|f((k))(z)=c■|f^((k+1))(z)|≥M,则F在D内正规,其中c≠0是必需的.     

分布值函数和分布的乘法（Ⅱ）

在超分布的代数运算的基础上定义了分布的U-乘积,具体计算了(δ~((m))(x)·δ~((n))(x))U、δ~((x))_U~n和(x~m·(δ(x))~(m+p))_U。利用U-乘积定义了分布的广义乘积,还引进了δ(x)在点a的值的概念。最后,研究了广义乘积在近代物理学中的两个应用:(1)给出了非线性波动方程的因果解;(2)给出了跃迁几率计算过程中使用的公式(δ(x))~2=δ(0)δ(x)的确切含义及证明。     

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.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

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.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.     

Generalization of the interaction between Haar approximation and polynomial operators to higher order methods

In applications it is useful to compute the local average empirical statistics on u. A very simple relation exists when of a function f（u） of an input u from the local averages are given by a Haar approximation. The question is to know if it holds for higher order approximation methods. To do so, it is necessary to use approximate product operators defined over linear approximation spaces. These products are characterized by a Strang and Fix like condition. An explicit construction of these product operators is exhibited for piecewise polynomial functions, using Hermite interpolation. The averaging relation which holds for the Haar approximation is then recovered when the product is defined by a two point Hermite interpolation.