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Difference between revisions of "Perfectly-normal space"

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====References====
 
====References====
 
<table><TR><TD valign="top">[a1]</TD> <TD valign="top">  E. Čech,  "Topological spaces" , Interscience  (1966)  pp. 532</TD></TR></table>
 
<table><TR><TD valign="top">[a1]</TD> <TD valign="top">  E. Čech,  "Topological spaces" , Interscience  (1966)  pp. 532</TD></TR></table>
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[[Category:General topology]]

Revision as of 19:56, 15 October 2014

A normal space in which every closed subset is a $G_\delta$-set (cf. Set of type $F_\sigma$ ($G_\delta$)).

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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=33670