节点文献
距离空间中上半连续函数的定义及等价条件
The Definition of Upper Continuity of Function in the Distance Space and its Equivalence Condition
【摘要】 根据距离空间中函数在某点的上极限、下极限的定义及函数在某点上半连续、下半连续的定义,证明了函数在某点上半连续的等价条件.
【Abstract】 According to the definition of upper limit and lower limit of function on a certain spot in the distance space,and the definition of upper continuity and lower continuity of function on a certain spot,the article proves the equivalence condition of the upper continuity of function on a certain spot.
【关键词】 距离空间;
上极限;
下极限;
上半连续;
下半连续;
【Key words】 distance space; upper limit; lower limit; upper continuity; lower continuity;
【Key words】 distance space; upper limit; lower limit; upper continuity; lower continuity;
- 【文献出处】 衡水师专学报 ,Journal of Hengshui Normal College , 编辑部邮箱 ,2003年03期
- 【分类号】O177
- 【被引频次】3
- 【下载频次】240