引用本文: | 何刚. 实数集R的不同拓扑结构和拓扑性质[J]. 云南农业大学学报(自然科学), 2007, 22(2): 290-292. |
Citation: | HE Gang. The Different Topological Structures and Topological Property In Real Number Set[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY(Natural Science), 2007, 22(2): 290-292. |