复振荡理论中关于超级的角域分布

设f_1和f_2是微分方程f″+A(z)f=0的两个线性无关的解,其中A(z)是无穷级整函数且超级σ_2(A)=0．令E=f_1f_2．本文研究了微分方程f″+A(z)f=0的解在角域中的零点分布,得出E的超级为+∞的Borel方向与零点聚值线的关系．     

关于单位圆内解析系数的二阶线性微分方程的复振荡

对二阶线性微分方程f" A1(z)f' A0(z)f=F(z)的复振荡进行了研究,其中系数Ai(z)(i=0,1)和F(z)是单位圆Δ={z|z|＜1}内的解析函数,获得解的超级和超零点收敛指数的估计,也得到了一些关于解的不动点的结果.     

二阶齐次与非齐次线性微分方程亚纯解的零点与增长性质估计(英文)

本文研究了方程f′′+A(z)f′+B(z)f=0与f′′+A(z)f′+B(z)f=F亚纯解的零点与增长性,其中A(z),B(z)(■0),F(z)(■0)为亚纯函数,得到了方程亚纯解的增长级、下级、超级、二级不同零点收敛指数等的精确估计,改进了KwonKi-Ho、陈宗煊与杨重骏、Benharrat Beladi等的结果.     

一类高阶线性微分方程解的增长性

本文研究了在Aj(z),aj(j=0,1,…,k-1)满足一些条件下方程f(k)+Ak-1(z)eak-1f(k-1)+…+A0(z)ea0zf=0解的超级和在Aj(z),Pj(j)(j=0,1,…,k-1)满足一些条件下方程f(k)+Ak-1(z)ePk-1(z)f(k-1)+…+Aj(z)eajzf(j)+…+A0(z)eP0(z)f=0解的级。     

On Multivalent Functions with Negative and Missing Coefficients

Let P_k(p, A, B) be the class of functions f(z) = z~p-sum from n=k to ∞(|α_(n+′p|Z~((n+)~-)p) k≥2 analytic in the unit disc E={z:|z|<1} and satisfying the condition |(zf′(z)/f(z)-p)/(Ap-Bzf (z)/f(z))|<1. for z∈E and -1≤B相似文献   

关于高阶整函数系数微分方程解的增长性

本文研究了微分方程f(k) (Ak-1(z)eak-1z Dk-1(z))f(k-1) … (A0(z)ea0z D0(z))f=0解的增长性问题,针对方程中aj(0≤j≤k-1)的幅角主值不全相等的情形,得到了方程解的增长级和超级的精确估计.     

关于单位圆内解析系数的二阶线性微分方程的复振荡

对二阶线性微分方程f″ A_1(z)f′ A_0(z)f=F(z)的复振荡进行了研究,其中系数A_i(z)(i=0,1)和F(z)是单位圆△={z:|z|<1}内的解析函数,获得解的超级和超零点收敛指数的估计,也得到了一些关于解的不动点的结果.     

关于近于凸函数类的某些子类

§1 引言设 f(z)在单位圆盘 E={z∶|z|<1}内解析,f(0)=1-f′(0)=0,其全体记作 A.用S~*,S~*(β)(β≤1),K 与 C 表示 A 的子类,类中函数在 E 内分别是星象的(关于原点),β级星象的,凸象的与近于凸的.函数 f(z)∈A 是β(β≤1)级预星象的(prestarxlike)当且仅当z/((1-z)~(2(1-β)))*f(z)∈S~*(β),若β<1;Re(f(z))/z>1/2(z∈E),若β=1,这里运算*表示两解析函数的 Hadamard 乘积(卷积).β级预星象函数类记作 R(β).显物 R(0)=K,R(1/2)=S~*(1/2).给定实数λ>-1,用 D~λ(z)=z/((1-z)~(λ+1))*f(z)定义算子 D~λ,这里 f(z)∈A.设 α≥0,0≤β<1,k 为正整数,又设解析函数 h(z)在 E 内是凸象单叶的,h(0)=1,Reh(z)>β     

与高阶导数有公共不动点的整函数

本文证明了如果f是非常数整函数满足超级σ_2(f)<1/2,k是一正整数,如果f和f(k)有公共不动点z CM,那么f~((k))(z)-z=c(f(z)-z),其中c是非零常数.     

整函数及其差分分担有限集的唯一性

研究了整函数及其差分多项式分担有限复数集的唯一性,得到了如下结果:设S_m={1,ω,…,ω~(m-1)},其中ω=cos(2π/m)+i sin(2π/m),c为非零有限复数,n(>5),m(≥2)均为正整数.如果f(z),g(z)为有限级整函数,满足E(S_m,f(z)~n(f(z)-1)f(z+c))=E(S_m,g(z)~n(g(z)-1))g(z+c)),那么f(z)≡g(z).     

Error-Controlled Model Order Reduction of Second Order Systems with Adaptive Choice of Shifts and Order

This contribution summarizes a novel approach to error-controlled model order reduction of second order systems, i. e. a new way to find a reduced order model of specified approximation quality. To this end, starting from a particular state space realization of the model, one performs multiple reduction steps and increments the reduced model until (computationally affordable) rigorous global error bounds fall below the prescribed limit. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)     

模糊全序及偏序结构

以Fodor等人对模糊偏好构模的公理化方法的一个特例为基础,给出了模糊全序以及偏序结构的定义,并详细讨论了两个结构的性质。     

On the Restricted Order of Asymptotic Bases of Order Two

The restricted order of an asymptotic basis A is the least integer h, if it exists, such that every sufficiently large integer is the sum of h or fewer distinct elements of A. We show that any asymptotic basis of order 2 has a restricted order at most equal to 4. We also provide an example of an additive basis of order 2 whose restricted order is 4.To Jean-Louis Nicolas2000 Mathematics Subject Classification: Primary—11B13     

Order of Operations

<正>In mathematics,A numerical expression like 4+3×5 or 2²+6÷2 is a combination of numbers and operations.The order of operations tells you which operation to perform first so that everyone gets the same final answer.What you will learn?Evaluate expressions using the order of operations.Today we will talk about"Order of Operations".     

The Order on the Rationals has an Orthogonal Order with the Same Order Type

Two orders on the same set are orthogonal if the constant maps and the identity map are the only maps preserving both orders. We construct linear orders orthogonal to the order on the rationals.     

First Order LSFEM for Second Order Hyperbolic Problems

In the last years the interest in least squares finite element methods has grown due to some interesting properties of these methods (cf. the monographs [1], [2]). While for many elliptic problems the theoretical background has been established, only a few articles analyse least squares methods for transient problems. In this article some new stability estimates for the least squares method for the wave equation in 1 and 2 dimensions are derived. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)     

某些家族p6阶群的自同构群的阶

本文确定了p6阶群的Φ27,Φ2s,Φ29,Φ30四个家族的所有群的自同构群的阶,这里p是奇素数.     

On the Order of Strongly Starlikeness of Convex Functions of Order Alpha

In this work the order of strongly starlikeness of convex functions of order alpha is discussed.     

实值随机变量的随机序与对偶随机序

本文讨论随机变量的高阶序问题，1简要地叙述了随机变量排序的经济学含义，主要是期望效用理论与其对偶理论，2讨论了实值随机变量基于分布函数的高阶序问题，给出了其基于期望效用理论的刻画。3讨论的是实值随机变量的基于对偶理论（对偶矩)的高阶序问题，并给出了其基于随机变量的Yarri等价性度量的刻画。     

On Projective Planes of Order 15 Admitting a Collineation of Order 7

In this article we prove that there is no projective plane of order 15 admitting a collineation group of order 21. C. Y. Ho proved that there is no projective plane of order 15 admitting a collineation group of order 49. But his proof is incorrect. We also correct his error. The conclusion remains the same. We used a computer for our research.