水木社区手机版
首页
|版面-数学科学(Mathematics)|
新版wap站已上线
返回
1/1
|
转到
主题:这道拓扑题怎么证?
楼主
|
qtpr
|
2025-08-07 18:13:27
|
只看此ID
If (X, T) is a Hausdorff door space, prove that:
1 At most one point x in X is a limit point of X.
2 If a point y in X is not a limit point of X, then the singleton set {y} is an open set.
--
FROM 111.167.209.*
1/1
|
转到
选择讨论区
首页
|
分区
|
热推
BYR-Team
©
2010.
KBS Dev-Team
©
2011
登录完整版