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...
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 〉 ...
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.
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...