带有q距离的向量Ekeland变分原理
2015-05-16付科程
付科程
(重庆师范大学数学学院,重庆 401331)
带有q距离的向量Ekeland变分原理
付科程
(重庆师范大学数学学院,重庆 401331)
基于变分原理的形式和空间的多样性,研究了带有q距离的向量Ekeland变分原理在分离序列完备一致空间中的一些重要应用.
向量Ekeland变分原理;q距离;分离序列完备一致空间
众所周知,Ekeland变分原理在数学非线性分析理论中有着非常重要的地位,它在非线性分析、全局控制优化理论、向量均衡问题、临界点理论与博弈论等诸多领域中有着十分重要的意义和作用.许多学者对Ekeland变分原理从空间和表达形式上进行了推广,得出了各种类型的Ekeland变分原理.基于此,研究了在分离序列完备一致空间中,带有q距离的向量Ekeland变分原理及其一些应用问题.
1 预备知识
定义1[5]设X是一个分离一致空间,有一个实值映射P:X×X→0,+∞[)满足以下条件:
2)对任意序列{yn}⊂X,若满足p(yn,ym)→0(m>n→∞),则称{yn}为柯西列,p(yn,y)→0等价于yn→y;
3)p(z,x)=0且p(z,y)=0,则x=y,对每个x,y,z∈X,称p为p距离.如果条件2)变为更弱的条件2*):对任意序列{yn}⊂X,若满足p(yn,ym)→0(m>n→∞)是柯西列,且在X内,p(yn,y)→0包含着yn→y,则称p为q距离.
引理1[2]Y是拓扑向量空间,K⊂Y是一个闭凸锥,ko∈K-K,定义非线性标量化函数ξko:Y→R∪{+∞}
则函数ξko(y)有以下几种性质:
(i)ξko(y)为真;
(ii)ξko(y)下半连续;
(iii)ξko(y)次线性;
(iv)ξko(y)为K-单调(即y1≤ky2,ξko(y1)≤ξko(y2));
定义2Y是拓扑向量空间,K⊂Y是一个闭凸锥,则关于K的预序“≤K”有如下定义:∀y1,y2∈Y,有y1≤Ky2当且仅当y2-y1∈K.
定义3函数f:X→Y∪{∞}被称为关于序列p下单调的,如果序列{xn}⊂X满足xn→且f(xn+1)≤Kf(xn),∀n∈N,则有f(¯x)≤Kf(xn),∀n∈N.
定义4设(X,U)是一致空间,p是q距离,f:X→Y∪{∞}关于≤K的下单调特征函数(如果dom f={x∈X,f(x)∈Y}≠∅)(X,U)关于(p,f)序完备,如果在X中有一个序列{xn}满足p(xn,xm)→0(m>n→∞),f(xn+1)≤Kf(xn),∀n∈N,则∃¯x∈x,使得
2 主要结果
[1]ADAN M,NOVO V.Proper Efficiency in Vector Optimization on Real Linear Spaces[J].J Optim Theory Appl,2004(121): 515-540
[2]DE D G.Figueiredo the Ekeland Variational Principle with Applications and Detours[M].Tata Institute of Fundamental Research,Bombay,1989
[3]BEDNARCZUK E M,PRZYBYLA M J.The Vector-valued Variational Principle in Banach Spaces Ordered by Cones with Nonempty Interiors[J].SIAM J Optim,2007(18):907-913
[4]CHEN G Y,YANG X Q,YU H.Vector Ekeland’s Variational Principle in an F-type Topological Space[J].Math Meth Oper Res,2008(67):471-478
[5]QIU J H,FEI H.P-Distances,Q-Distances and a Generalized Ekeland’s Variational Principle in Uniform Spaces[J].Acta Mathematics sinica English Senies,2012(2):235-254
[6]GOPFERT A,TAMMER CHR,ZALINESCU C.On the Vectorial Ekeland’s Variational Principle and Minimal Points in Product Spaces[J].Nonlinear Anal,2000(39):909-922
[7]LIN L J,DU W S.On Maximal Element Theorems,Variants of Ekeland’s Variational Principle and Their Applications[J].Nonlinear Anal,2008(68):1246-1262
[8]QIU J H.Ekeland’s Variational Principle in Locally Complete Spaces[J].Math Nachr,2003(257):55-58
[9]LIN L J,DU W S.Some Equivalent Formulations of the Generalized Ekeland’s Variational Principle and Their Applications[J].Nonlinear Analysis,2007(67):187-199
[10]BIANCHI M,KASSAY G,PINI R.Existence of Equilibria via Ekeland’s Principle[J].Journal of Mathematical Analysis and Applications,2005(305):502-512
Vector Ekeland’s Variation Principle With q Distance
FU Ke-cheng
(School of Mathematics,Chongqing Normal University,Chongqing 401331,China)
Based on the diversity of variation principle in form and space,this paper researches some important application of vector Ekeland’s variation principle with q distance in complete uniform space of separation sequence.
Vector Ekeland variation principle;q distance;complete uniform space of separation sequence
0176
A
1672-058X(2015)04-0032-04
10.16055/j.issn.1672-058X.2015.0004.009
2014-08-06;
2014-09-25.
付科程(1989-),男,重庆潼南人,硕士研究生,从事向量优化理论及应用研究.