拟半(E,F)}——凸函数及拟半(E,F)——凸规划的性质

简、胡及唐等(Int. J. Pure Appl. Math., 2004, 14(4): 439-454)于2004年提出了拟半(E,F)--凸函数的概念. 本文进一步深入讨论拟半(E,F)--凸函数及与之相应的拟半(E,F)--凸规划的一些重要性质, 建立了此类广义凸性的若干重要结论.     

高阶(F,η)-不变凸性下的多目标分式规划的最优性条件

定义了一类新的广义高阶(F,η)-不变凸函数、高阶(F,η)-伪不变凸函数、高阶(F,η)-拟不变凸函数等,并用若干的实例验证了该函数的存在性.在新广义凸函数的约束下,给出并证明了一类具有该广义凸性的多目标分式规划问题有效解和弱有效解的最优性充分条件.     

弱(F)-反演半群上的模糊(F)-核正规系

借助于模糊(F)-核正规系刻画了弱(F)-反演半群S(P)上的强(F)-同余.证明了S(P)上的每一个模糊强(F)-同余都是由它的模糊(F)-核正规系所唯一决定的.     

b-距离空间中α-(φ,ψ)压缩重合点定理

在b-距离空间中,建立了一类α-(φ,ψ)压缩重合点定理.这一结果将Yamaod等人的结果中的压缩系数s3放宽为sε,其中ε1.作为应用,给出了带有偏序关系的b-距离空间中的(φ,ψ)压缩重合点定理.这一结果可以推出Huang等人的一个主要结果.     

具有(F,α,ε)-G凸的分式半无限规划问题的ε-最优性

首次引入了（F,α,ε）-G凸函数,（F,α,ε）-G拟凸函数和（F,α,ε）-G伪凸函数等概念,对已有的凸函数进行了推广,研究了涉及这类函数的一类分式半无限规划的ε-最优性条件,得到了一些有意义的结果．这些结果不仅是现有某些结果的推广,而且为诸如资源分配,投资组合等问题的研究提供了依据,也为理论上研究分式规划提供了参考．     

图的联结数与[a,b]-因子存在性

设G是一个n阶图,a,b,m1,m2是非负整数且满足1≤a＜b和b≥m1.H1和H2是图G的两个边不交的子图且满足|E(H1)|=m1和|E(H2)|=m2.证明下列结论:若图G的联结数bind(G)＞(a+b-1)(n-1)/bn-(a+b)-2(m1+m2)+2且n≥(b-1)(a+b-1)(a+b-2)+2b(m1+m2)/b(b-1),则图G有一个[a,b]-因子F满足E(H1)(∈)E(F)和E(H2)∩ E(F)=φ.进一步指出这个结果是最好的.     

一类Lipschitz B-(p,γ)-不变凸函数与非光滑规划

设本文给出了一类新的Lipschitz B-(p,γ)-不变凸函数,它是B-不变凸函数和(p,γ)-不变凸函数的推广.在这类Lipschitz B-(p,γ)一不变凸性下,建立了非光滑规划的必要和充分最优性条件,讨论了Mond-Weir型对偶和Wolfe型对偶,证明了弱对偶、强对偶和逆对偶定理.所得结果推广了涉及凸函数、B-不变凸函数和(p,γ)-不变凸函数的规划问题的相应结果.     

基于(α,m)-预不变凸函数的Ostrowski型不等式

基于(α,m)-预不变凸函数的定义,利用Hlder不等式得到了一些新的(α,m)-预不变凸函数的Ostrowski型不等式,从而推广了已有文献中的结果.     

The relations among the three kinds of conditional risk measures

Let(Ω,E,P)be a probability space,F a sub-σ-algebra of E,Lp(E)(1 p+∞)the classical function space and Lp F(E)the L0(F)-module generated by Lp(E),which can be made into a random normed module in a natural way.Up to the present time,there are three kinds of conditional risk measures,whose model spaces are L∞(E),Lp(E)(1 p+∞)and Lp F(E)(1 p+∞)respectively,and a conditional convex dual representation theorem has been established for each kind.The purpose of this paper is to study the relations among the three kinds of conditional risk measures together with their representation theorems.We first establish the relation between Lp(E)and Lp F(E),namely Lp F(E)=Hcc(Lp(E)),which shows that Lp F(E)is exactly the countable concatenation hull of Lp(E).Based on the precise relation,we then prove that every L0(F)-convex Lp(E)-conditional risk measure(1 p+∞)can be uniquely extended to an L0(F)-convex Lp F(E)-conditional risk measure and that the dual representation theorem of the former can also be regarded as a special case of that of the latter,which shows that the study of Lp-conditional risk measures can be incorporated into that of Lp F(E)-conditional risk measures.In particular,in the process we find that combining the countable concatenation hull of a set and the local property of conditional risk measures is a very useful analytic skill that may considerably simplify and improve the study of L0-convex conditional risk measures.∞     

一类非光滑多目标半无限规划的最优性条件

利用K-方向导数,给出了一类存在性更为广泛的广义凸函数.即广义一致K-（F,α,ρ,d）-I型凸函数,进而讨论了涉及这些新广义凸性的一类多目标半无限规划的最优性条件。     

一类非线性多目标分式规划的最优性条件和对偶

本文利用亚线性函数和广义(F,α,ρ,d)-凸性的概念,给出了一类非线性多目标分式规划的充分性条件和对偶结果.     

On the E-Epigraph of an E-Convex Function

In Ref 1, Yang shows that some of the results obtained in Ref. 2 on E-convex programming are incorrect, but does not prove that the results which make the connection between an E-convex function and its E-epigraph are incorrect. In this note, we show that the results obtained in Ref. 2 concerning the characterization of an E-convex function f in terms of its E-epigraph are incorrect. Afterward, some characterizations of E-convex functions using a different notion of epigraph are given.     

Nonlinear programming with E-preinvex and local E-preinvex functions

In this paper, we extend the class of E-convex sets, E-convex and E-quasiconvex functions introduced by [Youness, E.A., 1999. E-convex sets, E-convex functions and E-convex programming. Journal of Optimization Theory and Applications 102, 439–450], respectively by [Syau, Yu-Ru, Lee, E. Stanley, 2005. Some properties of E-convex functions. Applied Mathematics Letters 18, 1074–1080] to E-invex set, E-preinvex, E-prequasiinvex and corresponding local concepts. Some properties of these classes are studied. As an application of our results, we consider the nonlinear programming problem for which, we establish that, under mild conditions, a local minimum is a global minimum.     

局部β-凸空间的共轭锥与Hahn-Banach定理

由 [1 ],局部β-凸空间 X的共轭锥 X*β 取代共轭空间在局部β-凸分析中扮演核心角色 .本文第一部分在局部β-凸空间上给出β-次半范的 Hahn-Banach定理 ,第二部分通过共轭锥 ( X*β ,‖‖ )得到赋β-范空间 ( X,‖‖β)的可分性定理 ,第三部分给出局部 β-凸空间的共轭锥 X*β 在一致收敛拓扑下的完备性定理等 .     

Some remarks about 1-convex manifolds on which all holomorphic line bundles are trivial

We give an abridged proof of an example already considered in [M. Col?oiu, On 1-convex manifolds with 1-dimensional exceptional set, Rev. Roumaine Math. Pures et Appl. 43 (1998) 97-104] of a 1-convex manifold X of dimension 3 such that all holomorphic line bundles on X are trivial. We also point out several mistakes of [Vo Van Tan, On the quasiprojectivity of compactifiable strongly pseudoconvex manifolds, Bull. Sci. Math. 129 (2005) 501-522] concerning this topic.     

Some inequalities of Hermite-Hadamard type for s-convex functions

In this paper several inequalities of the left-hand side of Hermite-Hadamard’s inequality are obtained for s-convex functions.     

一般化凸空间上的一个连续选择定理(英文)

本文研究一般化凸空间上的连续选择定理.利用在D■X的条件下,一般化凸空间(X,D;Γ)上Γ-凸子集的概念,得到了两类一般化凸空间之间,以及φ映射和Γ-凸映射之间的关系,并且得到了一个连续选择定理.本文推广了一般化凸空间上凸子集的概念.     

Meromorphic approximation theorem in a Stein space

We prove the meromorphic version of the Weil–Oka approximation theorem in a reduced Stein space X and give some characterizations of meromorphically -convex open sets of X. As an application we prove that for every meromorphically -convex open set D of a reduced Stein space X with no isolated points there exists a family of holomorphic functions on X such that the normality domain of coincides with D. Mathematics Subject Classification (2000)  32E10, 32C15, 32E30, 32A19     

关于α-凸函数的一个子类的Fekete-Szeg(o)不等式

摘要：引入α-凸函数的一个子类M（α;A,B）,讨论了这个函数类上的Fekete-Szego不等式,得到了准确的结果,推广了一些作者的结果．最后,给出了不等式在利用Hadamard积定义的函数类上的两个应用．