| 度量空间的sn开映象 |
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| 引用本文： | 康碧芳. 度量空间的sn开映象[J]. 漳州师范学院学报, 2007, 20(1): 13-16 |
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| 作者姓名： | 康碧芳 |
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| 作者单位： | 漳州师范学院数学与信息科学系 福建漳州363000 |
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| 摘 要： | 本文引进sn开映射,利用它把一类sn第一可数空间刻画为度量空间在不同sn开映射下的象,并给出sn开映射与1序列覆盖映射之间的关系.
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| 关 键 词： | sn开映射 sn网 sn第一可数 sn第二可数 |
| 文章编号： | 1008-7826（2007）01-0013-04 |
| 收稿时间： | 2006-09-12 |
| 修稿时间： | 2006-09-12 |
On the sn-open Images of Metric Spaces |
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| KANG Bi-fang. On the sn-open Images of Metric Spaces[J]. Journal of ZhangZhou Teachers College(Natural Science), 2007, 20(1): 13-16 |
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| Authors: | KANG Bi-fang |
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| Affiliation: | Department of Mathematics and Infromation Science, Zhangzhou Normal University, zhangzhouFujian 363000, China |
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| Abstract: | In this paper, we will introduce sn-open mapping. by using it, certain sn-first countable spaces are characterized as images of metric spaces under various sn-open mappings. In particular, this paper give the relation between sn -open mapping and 1-sequence-covering mapping. |
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| Keywords: | sn -open mappings sn-network sn-first countable sn-second countable |
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