1) Y is strongly regular in X
Y在X中超正则
2) Y is superregular in X
Y在X中强正则
3) Y is regular in X
Y在X中正则
4) Y is δ-regular in X
Y在X中δ-正则
5) Y is δ-normal in X
Y在X中δ-正规
6) Y is normal in X
Y在X中正规
1.
It is proved that if Y is Ti in X,then Y is Ti-1 in X,where i is from 3 to 4;When Y is a open and closed subspace of X,Y is normal in X if and only if Y is quasi-normal in X if and only if Y is strongly normal in X.
本文讨论了拓扑空间的相对分离性,证明了若Y在X中是Ti的,则Y在X中是Ti-1(i=3,4);当Y是X的既开又闭子空间时,Y正规、Y在X中正规、Y在X中拟正规和Y在X中强正规是等价的。
补充资料：凡事豫则立，不豫则废
1.谓做任何事情，事先谋虑准备就会成功，否则就要失败。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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