圆内亚纯函数充满圆及其应用

<正> 复平面内的充满圆序列在值分布论中有许多重要应用.对圆内亚纯函数的充满圆序列却比较复杂,相当困难.虽有人研究但总是不理想,不便应用.本文首先定义了圆内的充满圆序列,并证明 Borel 点附近存在充满圆序列,从而得到有穷正级圆内亚纯函数存在充满圆序列.最后作为应用证明了对应于 Hayman 不等式的奇异点存在.     

单位圆内无限级拟亚纯映射的充满圆

本文研究了单位圆内无限级拟亚纯映射的充满圆，证明了单位圆内存在充满圆序列；Borel点邻域内存在充满圆序列．     

单位圆内拟亚纯映射的充满圆

对于单位圆内的拟亚纯映射,研究了其充满圆的一个几何性质,从而证明了一个充满圆序列的存在性定理。     

单位圆内亚纯函数的充满圆

本文推广了Ahlfors不等式，给出了亚纯函数的充满圆的一个几何特征，从而证明了单位圆内亚纯函数的充满圆序列的存在性.此外还举例说明了这些结果就充满圆的指数而言是最好的．     

代数体函数的充满圆

代数体函数是否存在充满圆序列？是个一直未解决的基本问题．木文证明了有限正级Ｋ值代数体函数，必定存在充满圆序列．从而关于亚纯函数的一些结论．有可能推广到代数体函数．     

单位圆内拟亚纯映射的重值

单位圆内充满圆序列是一个复杂的问题,该文改进了现有一些证法,使单位圆内充满圆证法类似于平面上充满圆证法.同时得到单位圆内K-拟亚纯映射涉及重值的充满圆序列及相应的奇异半径     

BOREL方向上的充满圆

本文讨论了在 Banel 方向上存在充满圆序列的条件.把 Rauch 定理推广到包含无限级和部分零级的半纯函数.构造了具有 Banel 方向而无充满圆序列的半纯函数.本文用⊿(θ)表示一条从原点引出的半直线:angz=θ.用 n(E,α)表示函数 f(z)在集合 E 内的 α 值点个数,α可为有限,也可以为无穷,且都计算重数.我们用 C.K 表示正常数,且前后出现的可以表示不同的常数.     

拟亚纯映射的充满圆

该文用较简明的方法讨论了平面上K 拟亚纯映射在\{lim[DD(X]r→∞[DD)]\}[TX-][SX(]S(r,f)[]lgr[SX)]=∞ 条件下及有限正级K 拟亚纯映射存在充满圆序列, 同时也证明了零级K 拟亚纯映射的最大型Borel方向及有限正级Borel方向上存在充满圆序列.     

无穷级拟亚纯映射的充满圆及Borel方向

对于平面上的K-拟亚纯映射，文献^[1]里证明了有限正级K-拟亚纯映射必定存在充满圆序列及Borel方向；本文进一步证明了对于平面上无穷级K-拟亚纯映射也存在充满圆序列及Borel方向．     

单位圆内代数体函数的充满圆及Borel半径

研究了单位圆内具有有限个分支点的代数体函数,并用覆盖曲面的几何方定义了他们的级和Borel半径,得到了在单位圆内大于1的有穷级代数体函数必存在充满圆及Borel半径.     

半参数两样本密度比率模型估计问题的一点注记

In this paper,a semiparametric two-sample density ratio model is considered and the empirical likelihood method is applied to obtain the parameters estimation.A commonly occurring problem in computing is that the empirical likelihood function may be a concaveconvex function.Here a simple Lagrange saddle point algorithm is presented for computing the saddle point of the empirical likelihood function when the Lagrange multiplier has no explicit solution.So we can obtain the maximum empirical likelihood estimation (MELE) of parameters.Monte Carlo simulations are presented to illustrate the Lagrange saddle point algorithm.     

A Note on the Estimation of Semiparametric Two-Sample Density Ratio Models

In this paper,a semiparametric two-sample density ratio model is considered and the empirical likelihood method is applied to obtain the parameters estimation.A commonly occurring problem in computing is that the empirical likelihood function may be a concaveconvex function.Here a simple Lagrange saddle point algorithm is presented for computing the saddle point of the empirical likelihood function when the Lagrange multiplier has no explicit solution.So we can obtain the maximum empirical likelihood estimation (MELE) of parameters.Monte Carlo simulations are presented to illustrate the Lagrange saddle point algorithm.     

A new contraction principle in menger spaces

In the present work we introduce a new type of contraction mapping by using a specific function and obtain certain fixed point results in Menger spaces. The work is in line with the research for generalizing the Banach＇s contraction principle. We extend the notion of altering distance function to Menger Spaces and obtain fixed point results.     

黎曼函数的极大性及其应用

得到了黎曼函数的一个新的性质——极大性,即黎曼函数在任意非零值点处取得严格极大值,并讨论了这一性质的应用.     

一类微分方程系统正平衡解的存在性与全局稳定性

本文研究了一个自治的非线性微分方程系统,得到了系统正平衡点存在唯一的充分条件,通过伸缩变换法讨论了正平衡点局部稳定性,并运用构造Liapunov函数方法得到了它的全局渐近稳定性.     

Positive solutions for an oscillator fractional initial value problem

In this paper, we will study a fractional initial value problem. By using Laplace transform, we obtain an equivalent fixed point problem, that is a Volterra integral equation involving the generalized Mittag-Leffler function in the kernel. The existence results are obtained by some fixed point theorems.     

On the qualitative approximation of Lipschitzian functions

Problem of topological equivalence between a function and certain local approximations is studied. The study is carried out in a neighbourhood of a critical point with the concept of critical point of Clarke's theory. The function belongs to a particular class of non B-differentiable functions. The local approximations are positively homogeneous maps. Using the concept of topological equivalence we establish the existence of a local coordinate transformation between the original function and the positively homogeneous function. As a consequence we obtain sufficient conditions for the existence of local extremes for the initial map.     

On the convergence of double Fourier series of discontinuous functions

In the paper we obtain a formula for the computation of the rectangular partial sums of a double Fourier series of a function of two variables at the point (0, 0), having a discontinuity along any ray at this point. We also give an estimate of the remainder in the abovementioned formula.     

代数体函数涉及重值的Borel点

研究了单位圆内代数体函数涉及重值的Borel点的存在性,利用型函数统一证明了单位圆内无穷级,有限正级和部分零级代数体函数存在涉及重值的Borel点,并对有限正级的代数体函数得到两个必要条件.     

集值映射最优化问题超有效解集的连通性

本文在局部凸空间中对集值映射最优化问题引入超有效解的概念．首先研究了超 有效点的一些重要特性．其后证明了当目标函数为锥类凸的集值映射时，其目标空间里 的超有效点集是连通的；若目标函数为锥凸的集值映射时，其超有效解集也是连通的．