摘要
本文讨论R上的保持某些距离值不变的映射,得到了R上(强)保a映射的表示定理,并证明了即使 在R上(强)保无穷多个距离值的映射也未必是等距的.
This paper discusses real functions preserving some values of distance, a representation theorem of (strongly) distance-a preserving maps on R is obtained, and it is proved that even a map on R which preserves infinitely many values of distance is not necessarily isometric.
出处
《南开大学学报(自然科学版)》
CAS
CSCD
北大核心
2003年第3期53-56,共4页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
国家自然科学基金资助项目(10271060)
高校博士点基金资助项目(20010055013)
关键词
保α映射
强保α映射
等距映射
有理Hamel基
distance-a preserving map
strongly distance-a preserving map
isometric map
rational Hamel basis