Difference between revisions of "Perfectly-normal space"
From Encyclopedia of Mathematics
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| − | A [[Normal space|normal space]] in which every closed subset is a | + | {{TEX|done}} |
| + | A [[Normal space|normal space]] in which every closed subset is a $G_\delta$-set (cf. [[Set of type F sigma(G delta)|Set of type $F_\sigma$ ($G_\delta$)]]). | ||
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Revision as of 14:30, 26 September 2014
A normal space in which every closed subset is a $G_\delta$-set (cf. Set of type $F_\sigma$ ($G_\delta$)).
Comments
References
| [a1] | E. Čech, "Topological spaces" , Interscience (1966) pp. 532 |
How to Cite This Entry:
Perfectly-normal space. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Perfectly-normal_space&oldid=14531
Perfectly-normal space. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Perfectly-normal_space&oldid=14531