二阶复域微分方程解的不动点与超级

文中首次研究了４种类型的整函数系数的二阶线性微分方程的解的不动点及超级问题,得到：复域微分方程解的不动点性质,由于受到微分方程的制约,与一般超越整函数的不动点性质相比,是十分有趣的．     

亚纯系数的高阶线性微分方程的解的增长性

本文研究亚纯系数的高阶线性微分方程,当方程系数满足一定条件时,得到方程的每一非零亚纯解具有无穷级且超级为n.此外,还研究了非齐次线性微分方程的亚纯解.     

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.     

Growth of Solutions to Higher Order Differential Equation with Meromorphic Coefficients

In this paper, we study the growth of solutions of higher order differential equation with meromorphic coefficients, and find some conditions which guarantee that its every nontrivial solution is of infinite order.     

一类亚纯系数高阶线性微分方程解的增长性

In this paper, we investigate the growth of solutions of higher order linear differ-ential equations with meromorphic coefficients. Under certain conditions, we obtain precise estimation of growth order and hyper-order of solutions of the equation.     

一类二阶线性微分方程解的增长性

本文研究一类二阶齐次线性微分方程f"+A_1(z)e~(P(z))f'+A_0(z)e~(Q(z))f=0,解的增长性,其中P(z)=az~n,Q(z)=bz~n,ab≠0,a=cb(c1),A_j(z)(j=0,1)是非零多项式,证明了该方程的每个非零解满足σ(f)=∞并且σ_2(f)=n.     

Fixed Points and Hyper Order of Differential Polynomials Generated by Solutions of Differential Equation

This article studies the problem on the fixed points and hyper-order of differential polynomials generated by solutions of two type of second order differential equations. Because of the control of differential equation, we can obtain some precise estimates of their hyper-order and fixed points.     

关于超越系数的Riccati方程亚纯解的增长性

该文讨论了Riccati方程亚纳解的增长性问题,证明了我们曾给出的解的高阶增长级的上界稍加修改后即为一种最佳上界     

一类亚纯函数系数线性微分方程亚纯解的增长级

该文讨论了齐次线性微分方程f~(k)+A_(k-1)f~(k-1)+…+Aof=0,k≥2的解的增长级,其中方程的系数为至多有有限多个极点的亚纯函数,在一定条件下,得到了方程亚纯解的精确估计,这也是Gundersen、陈宗煊和高仕安等人在整函数系数下结果的推广.     

亚纯系数的非齐次线性微分方程的振荡解

本文研究关于亚纯系数的非齐次线性微分方程的复振荡,得到方程f(k)+ak-1fk-1+…+a0f=F(a0,a1,…,ak-1和F是亚纯函数)具有一个振荡解空间,其空间中所有解的零点收敛指数为∞,至多除去一个例外值.     

亚纯系数齐次线性微分方程解的性质

本文研究了慢增长亚纯系数齐次线性微分方程亚纯解的零点收敛指数,得到了这类方程的线性无关超越解的最少个数和零点收敛指数为有穷的解的最多个数。     

关于高阶整函数系数微分方程解的增长性的进一步结果

本文研究一类高阶整函数系数微分方程的增长性问题，当存在某个系数对方程的解的性质起主要支配作用时，得到了齐次与非齐次方程解的超级的精确估计及方程的解与小函数的关系。     

2阶抽象微分方程的周期解

本文考虑Banach空间中形如x″=A(t)x f(t,x,x′)的2阶微分方程,利用基于度理论的一定不动点定理得到了以上方程存在周期解的若干充分条件。     

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.     

系数的级相同的高阶微分方程解的增长性

In this paper,we consider the growth of solutions of some homogeneous and nonhomogeneous higher order differential equations.It is proved that under some conditions for entire functions F,A_(ji) and polynomials P_j(z),Q_j(z)(j=0,1,…,k-1;i=1,2)with degree n≥1,the equation f~(k)+(A_(k-1,1)(z)e~(p_(k-1)(z))+A_(k-1,2)(z)e~(Q_(k-1(z)))/~f~(k-1)+…+(A_(0,1)(z)e~(P_o(z))+A_(0,2)(z)e~(Q_0(z)))f=F,where k≥2,satisfies the properties:When F ≡0,all the non-zero solutions are of infinite order;when F=0,there exists at most one exceptional solution fo with finite order,and all other solutions satisfy λ(f)=λ(f)=σ(f)=∞.     

二阶亚纯系数微分方程解的零点分布

应用角域Nevanlinna理论,研究了二阶亚纯系数微分方程f′′+A(z)f=0的解的零点聚值线和Borel方向之间的关系.推广了文献[5]中的一个定理.     

Oscillatory Periodic Solutions of Nonlinear Second Order Ordinary Differential Equations

In this paper the existence results of oscillatory periodic solutions are obtained for a second order ordinary differential equation -u″（t） = f（t, u（t））, where f ： R^2 → R is a continuous odd function and is 2π-periodic in t. The discussion is based on the fixed point index theory in cones.     

二阶非线性常微分方程的正周期解

本文应用Ｋｒａｓｎｏｓｅｌｓｋｉｉ锥映射不动点定理，研究了二阶非线性常微分方程的ω-周期解的存在性，获得了若干正ω-周期解的存在性与多重性结果．     

On the Growth of Solutions of a Class of Higher Order Linear Differential Equations

In this paper, we investigate the growth of solutions of the differential equations f(k)+Ak?1(z)f(k?1)+· · ·+A0(z)f =0, where Aj(z)(j=0, · · · , k?1) are entire functions. When there exists some coe?cient As(z)(s ∈ {1, · · · , k?1}) being a nonzero solution of f00+P(z)f =0, where P(z) is a polynomial with degree n(≥1) and A0(z) satisfiesσ(A0)≤1/2 or its Taylor expansion is Fabry gap, we obtain that every nonzero solution of such equations is of infinite order.     

Explicit Meromorphic Solutions of a Certain Briot-Bouquet Differential Equations

This paper deals with the Briot-Bouquet differential equations with degree three. The previous result shows that all the meromorphic solutions belong to W. Here,by applying the Kowalevski-Gambier method, the authors give all the possible explicit meromorphic solutions. The result is more applicable. Also, this method can be used to deal with the more general Briot-Bouquet differential equations.