单位圆到凸区域上的调和拟共形映照

设F（x）=p（x）e^ir（x）为单位圆周到约当凸曲线Γ上的保向同胚映照.本文证明:若ess inf|F’（x）|>0且对于一切的φ∈R有|F（φ+x）+F（φ-x）-2F（φ）|≤M|x|^α,这里α>1,M为正常数,则ω=P[F]（z）为单位圆到凸区域Ω=int（Γ）上为调和拟共形映照.     

极大单调算子和m增生映射值域的扰动定理及在非线性微分方程上的应用

利用不动点定理,分别证明了在自反Banach空间中极大单调算子值域扰动的抽象结论和在H ilbert空间中m增生映射值域的扰动结果,这些结论是对以往一些工作的推广;然后,利用文中的新结论讨论了一类微分方程解的存在性.     

B_p上α凸映照

该文对当α≥0时给出Bp上α凸映照与星形映照之间的关系，给出一些Bp上α凸映照的例子.     

极大单调算子的扰动定理及在微分方程上的应用

利用不动点定理,首先证明了在自反Banach空间中极大单调算子扰动的抽象结论,这些结论是对以往一些工作的推广;然后,利用文中的新结论讨论了一类微分方程解的存在性.     

用增生映射的理论研究一类椭圆边值问题解的存在性

受非线性增生映射值域的扰动定理的启发,研究了非线性边值问题（＠）在Lp（Ω）,1＜P＜＋∞中解的存在性．其中f∈Lp（Ω）,1＜p＜ ∞给定,g：Ω×R→R满足Caratheodory条件．本文把Gupta和Hess所研究的非线性议程加以推广,即在议程中增加了这一项,并把解的存在性的讨论由L2（Ω）窨推广到LP（Ω）,1＜p＜ ∞空间中。     

与广义P-Laplace算子相关的非线性边值问题在一族空间中解的存在性

利用非线性增生映射值域的扰动定理,研究了非线性椭圆边值问题(1)在Ls(Ω)空间中解的存在性,其中max(N,2)ps< ∞.(1)-div(C(x) |u|2)p-22u |u|p-2u g(x,u(x))=fa.e.x∈Ω-〈n,(C(x) |u|2)p-22u〉∈βx(u(x))a.e.x∈Γ这里f∈Ls(Ω)给定,ΩRN为有界锥形区域,n为Γ的外法向导数,g∶Ω×R→R满足Caratheodory条件且对x∈Γ,βx是正常、凸、下半连续函数φx=φ(x,.)的次微分,其中φ∶Γ×R→R.本文是对笔者以往一些工作的继续和补充.     

On the stability of a mixed functional equation deriving from additive,quadratic and cubic mappings

In this paper, we investigate the general solution and the Hyers–Ulam stability of the following mixed functional equation f(2x + y) + f(2x- y) = 2f(2x) + 2f(x + y) + 2f(x- y)- 4f(x)- f(y)- f(-y)deriving from additive, quadratic and cubic mappings on Banach spaces.     

A generalization of vectorial equilibria

A generalized form of vectorial equilibria is proposed, and, using an abstract monotonicity condition, an existence result is demonstrated.     

A class of Loewner chain preserving extension operators

We consider operators that extend locally univalent mappings of the unit disk Δ in C to locally biholomorphic mappings of the Euclidean unit ball B of Cn. For such an operator Φ, we seek conditions under which etΦ(e−tf(⋅,t)), t?0, is a Loewner chain on B whenever f(⋅,t), t?0, is a Loewner chain on Δ. We primarily study operators of the form , , where β∈[0,1/2] and is holomorphic, finding that, for ΦG,β to preserve Loewner chains, the maximum degree of terms appearing in the expansion of G is a function of β. Further applications involving Bloch mappings and radius of starlikeness are given, as are elementary results concerning extreme points and support points.     

On smoothness of symmetric mappings II

If the dilatation of a quasiconformal selfmap of the upper half-plane vanishes near the real line as a power of the height, the induced quasisymmetric mapping is Lipschitz with the same exponent. In this note, it is shown that the converse does not hold for any positive exponent. In addition, a sufficient condition is found to have locally a quasiconformal extension with the desired growth in the dilatation.

     

集值映射与不动点

应用D关于β对应关系是正常的构架,引用子集法,通过取凸包与闭包,由单值映射构造集值映射,利用Kakutani不动点定理,讨论几种类型的集值映射的不动点.     

仿紧局部cosmic空间的一些性质

给出仿紧局部cosmic空间的一些特征,建立了仿紧局部cosmic空间的几类序列覆盖L映象的特征,证明了闭L映射和商ss映射保持仿紧局部cosmic空间的性质,此外,还给出仿紧局部cosmic空间的一些映射性质。     

Criteria for biholomorphic convex mappings on the unit ball in Hilbert spaces

In this paper, we give a necessary and sufficient condition that a locally biholomorphic mapping f on the unit ball B in a complex Hilbert space X is a biholomorphic convex mapping, which improves some results of Hamada and Kohr and solves the problem which is posed by Graham and Kohr. From this, we derive some sufficient conditions for biholomorphic convex mapping. We also introduce a linear operator in purpose to construct some concrete examples of biholomorphic convex mappings on B in Hilbert spaces. Moreover, we give some examples of biholomorphic convex mappings on B in Hilbert spaces.     

关于相关系间的同构映射

建立了相关系间的同构映射,给出了相关系间同构映射的一些等价条件,并通过具体的同构映射揭示出相关系的一些内在本质.     

Starlike and convex rational mappings on infinite dimensional domains

We give starlike criteria for a class of rational mappings on the open unit ball of a complex Banach space. We also give a sufficient condition for these mappings to be convex when they are defined in Hilbert spaces. These criteria facilitate the construction of concrete examples of starlike and convex mappings on infinite dimensional domains (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

有限区间上的函数K<1集压缩映象场拓扑数的性质

文[1]证明了定义在有界闭集上的函数K<1集压缩映象是紧压缩映象,本文主要对定义在有界开集的闭包上的函数K<1集压缩映象场的拓扑度数的性质进行讨论.     

m-增生算子非紧性扰动的值域

设X是一个实B anach空间,X*为其对偶空间,G是X的开、有界子集.T∶D(T)X→2X是m-增生算子,C∶D(T)→X是有界算子.分别在C(T I-)1非扩张与C(λT I)-1紧的情况下,利用凝聚映射的度理论,考虑了方程0∈R(T C)的可解性问题.定理4中在边界条件只为(I-(T C))(D(T)∩G)G的情况下用L-S度理论考虑了方程0∈(T C)(D(T)∩G)的可解性问题.这些定理推广了一些已有结果.     

关于保持距离映射的Aleksandrov问题

设E,F为实Hilbert空间,f:E→F为一映射,本文证明了在一定条件下,若f保距离a和b(其中,a,b为两个正实数),则f为一个仿射等距,从而部分地解决了Aleksandrov在1970年提出的Aleksandrov问题。     

The Derived Mappings and the Order of a Set-Valued Mapping Between Topological Spaces

Previous investigations of, in particular, continuous selections have led to the definition of the derived mappings and, here, the order of a set-valued mapping between topological spaces. The relation between the topological spaces and the possible orders of set-valued mappings between them is considered and examples are constructed to show that each ordinal number is the order of some set-valued mapping.     

Convergence theorems for semigroup-type families of non-self mappings

Motivated by a paper Chidume and Zegeye [Strong convergence theorems for common fixed points of uniformly L-Lipschitzian pseudocontractive semi-groups, Applicable Analysis, 86 (2007), 353–366], we prove several strong convergence theorems for a family (not necessarily a semigroup) ℱ = {T(t): t ∈ G} of nonexpansive or pseudocontractive non-self mappings in a reflexive strictly convex Banach space with a uniformly Gateaux differentiable norm, where G is an unbounded subset of ℝ⁺. Our results extend and improve the corresponding ones byMatsushita and Takahashi [Strong convergence theorems for nonexpansive nonself-mappings without boundary conditions,Nonlinear Analysis, 68 (2008), 412–419],Morales and Jung [Convergence of paths for pseudo-contractive mappings in Banach spaces, Proceedings of American Mathematical Society, 128 (2000), 3411–3419], Song [Iterative approximation to common fixed points of a countable family of nonexpansive mappings, Applicable Analysis, 86 (2007), 1329–1337], Song and Xu [Strong convergence theorems for nonexpansive semigroup in Banach spaces, Journal of Mathematical Analysis and Applications, 338 (2008), 152–161], Wong, Sahu, and Yao [Solving variational inequalities involving nonexpansive type mappings, Nonlinear Analysis, (2007) doi:10.1016/j.na. 2007.11.025] in the context of a non-semigroup family of non-self mappings.