supported in part by National Natural Science Foundation of China(Grant Nos. 10826044, 10771059, 96104100);the Major State Basic Research Development Program of China(Grant No. 76073200) respectively
In this paper, we introduce the pseudo-affine transformations, a new class of maps, and obtain their characterization in terms of g-triangle-reflections.
supported by National Natural Science Foundation of China (Grant No.10771059);Tianyuan Foundation
Suppose that f:Hn → Hn (n≥2) maps any r-dimensional hyperplane (1≤r<n) into an r-dimensional hyperplane. In this paper, we prove that f is an isometry if and only if f is a surjective map. This result gives an a...
Supported by the Natural Science Foundations of China(10771059);Natural Science Foundations of Hunan Province(05JJ10001);Program for New Century Excellent Talents in University(04-0783);Program for Hengyang Normal University(08B06)