国家自然科学基金(10571090)

作品数:30被引量:31H指数:3
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相关作者:王瑞东刘锐伊继金傅小红任卫云更多>>
相关机构:南开大学天津理工大学聊城大学河北师范大学更多>>
相关期刊:《数学学报(中文版)》《Acta Mathematica Sinica,English Series》《系统科学与数学》《Science China Mathematics》更多>>
相关主题:单位球面等距延拓等距等距映射等距算子更多>>
相关领域:理学更多>>
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关于保距离映射(英文)
《南开大学学报(自然科学版)》2010年第4期90-93,共4页马正博 
Supported by National Natural Science Foundation of China(10571090);the Research Fund for the Doctoral Program of Higher Education(20060055010)
对于保持两个或多个距离的映射f:X→Y来说,其关于推广的Aleksandrov问题的几种情况在本文中被解决.这里的X和Y都是指实内积空间,并且X的维数大于一.
关键词:内积空间 平行四边形 等距映射 
l^1(Γ)型空间1-Lipschitz映象的延拓问题(英文)
《南开大学学报(自然科学版)》2010年第1期17-19,23,共4页王瑞东 伊继金 
Supported by NSFC(10571090);the Doctoral Programe Foundation of Institution of Higher Education(20060055010)
T为S(l^1(Γ))到S(l^1(Δ))的满映射,如果T^(-1)为1-Lipschitz并且UretsuppT(e_r)=Δ,则T可延拓为l^1(Γ)到l^1(Δ)的线性等距映射。
关键词:等距延拓 1-Lipschitz l^1(Γ)型空间 
The Extension of Isometry between Unit Spheres of Normed Space E and l^1
《Journal of Mathematical Research and Exposition》2009年第5期901-906,共6页ZHAN Hua Ying 
Foundation item: the National Natural Science Foundation of China (No. 10571090); the Research Fund for the Doctoral Program of Higher Education (No. 20060055010) and the Fund of Tianjin Educational Comittee (No. 20060402).
The main result of this paper is to prove Fang and Wang's result by another method: Let E be any normed linear space and Vo : S(E)→ S(l^1) be a surjective isometry. Then V0 can be linearly isometrically extend...
关键词:ISOMETRY surjective linearly isometric extension. 
On Extension of Isometries Between the Unit Spheres of Normed Space E and l^p(p>1)被引量:1
《Acta Mathematica Sinica,English Series》2009年第7期1139-1144,共6页Ji Jin YI Rui Dong WANG 
Supported by Natural Science Foundation of China (Grant No. 10571090);The second author is supported by NSFC (Grant No. 10571090);the Doctoral Program Foundation of Institution of Higher Education (Grant No. 20060055010)
In this paper, we study the extension of isometries between the unit spheres of normed space E and lP(p 〉 1). We arrive at a conclusion that any surjective isometry between the unit sphere of normed space lP(p 〉 ...
关键词:isometric mapping isometric extension strictly convex 
单位球面上的等距延拓
《数学物理学报(A辑)》2008年第6期997-1001,共5页李磊 
国家自然科学基金(10571090);高校博士点基金(20060055010)资助
该文研究了实赋范空间的单位球面上的等距算子延拓问题.为此,作者定义一个新的空间E#,称之为正齐性对偶空间,并且研究了E^#上的一个新的拓扑σ(E^#,E).从而,作者就可以证明实赋范空间的单位球面上的一类满等距算子可以线性延...
关键词:正齐性 等距延拓 单位球面 
赋范空间中到内等距映射的线性延拓被引量:1
《南开大学学报(自然科学版)》2008年第6期78-82,共5页伊继金 王瑞东 
国家自然科学基金(10571090)
主要研究了任意两个实赋范线性空间的单位球面S(E)和S(F)之间的任意映射的线性延拓问题以及E中任意单位球到空间F的等距映射的线性延拓问题.
关键词:等距 等距延拓 TINGLEY问题 
有界线性算子空间内的c_0的可补渐进等距翻版(英文)
《南开大学学报(自然科学版)》2008年第6期88-91,共4页詹华英 
Supported by the National Natural Science Foundation of China (10571090)
给出了一个巴拿赫空间具有w^*-延拓性质的定义.主要给出了有界线性算子L(X,Y)含有C0的可补渐进等距翻版的充分条件.
关键词:有界线性算子空间 渐进等距翻版 可补的 w^*-延拓性质 w^*-列紧 
二维严格凸赋范空间单位球面间等距映射的线性延拓被引量:2
《数学学报(中文版)》2008年第5期847-852,共6页王瑞东 
国家自然科学基金资助项目(10571090);高校博士点基金资助项目(20060055010)
主要研究二维严格凸实赋范空间E和F的单位球面S_1(E)和S_1(F)之间的等距映射的线性延拓问题.利用二维严格凸赋范空间单位球面的性质得到:若等距映射V_0:S_1(E)→S_1(F)满足一定条件,则V_0可延拓为全空间E上的线性等距映射V:E→F.
关键词:TINGLEY问题 等距 线性延拓 严格凸赋范空间 
The isometric extension of “into” mappings on unit spheres of AL-spaces被引量:7
《Science China Mathematics》2008年第10期1904-1918,共15页DING GuangGui School of Mathematics Science, Chern Institute of Mathematics and LPMC, Nankai University, Tianjin 300071, China 
the Research Foundation for Doctor Programme (Grant No. 20060055010) ;the National Natural Science Foundation of China (Grant No. 10571090)
In this paper, we show that if V0 is an isometric mapping from the unit sphere of an AL-space onto the unit sphere of a Banach space E, then V0 can be extended to a linear isometry defined on the whole space.
关键词:ISOMETRIC extension (atomic) AL-space 
A Note of Paper "Banach Spaces Failing the Almost Isometric Universal Extension Property"
《Journal of Mathematical Research and Exposition》2008年第3期613-616,共4页ZHAN Hua Ying 
the National Natural Science Foundation of China (No. 10571090); the Research Foundation for the Doctoral Program of Higher Education (No. 20060055010); the Research Foundation of Tianjin Municipal Education Commission (No. 20060402).Acknowledgement The author would like to thank Professor Ding Guanggui for his guidance, and thank the referees for their valuable comments and suggestions.
The definition of property A with constant α was introduced by D. M. Speegle, who proved that every infinite dimensional separable uniformly smooth Banach space has property A with constant α∈ [0, 1). In this pape...
关键词:property A with constant α modulus of convexity λ-EP λ-UEP. 
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