| ppl-空间、wppl-空间被闭Lindeloef映射逆向保持 |
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| 引用本文： | 刘德金.ppl-空间、wppl-空间被闭Lindeloef映射逆向保持[J].山东师范大学学报(自然科学版),2007,22(1):13-14. |
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| 作者姓名： | 刘德金 |
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| 作者单位： | 德州学院数学系,山东德州253023 |
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| 摘 要： | 对ppl-空间、wppl-空间的映射性质进行了探讨，得到的主要结果是：ppl-空间、wppl-空间被闭undeloef映射的逆向所保持．
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| 关 键 词： | 完全聚点 pl-集 ppl-空间 wppl-空间 闭Lindeloef映射 点可数 |
| 修稿时间： | 2006-08-16 |
ppl - SPACE, wppl - SPACE IS PRESERVED BY INVERSE IMAGE OF CLOSED LINDELoeF MAPPING |
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| Liu Dejin.ppl - SPACE, wppl - SPACE IS PRESERVED BY INVERSE IMAGE OF CLOSED LINDELoeF MAPPING[J].Journal of Shandong Normal University(Natural Science),2007,22(1):13-14. |
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| Authors: | Liu Dejin |
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| Institution: | Departmet of Mathematics, Dezhou College, 253023, Dczhou, Shandong, China |
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| Abstract: | It gives a property of ppl - space and wppl - space. The main result of it is that the ppl - space and wppl - space is preserved by inverse image of closed Lindeloef mapping. |
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| Keywords: | complete cluster point pl - set ppl - space wppl - space closed Lindeloef mapping point countable |
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