Title of article
On Fσ-δ-normality and hereditary δ-normality
Author/Authors
Roman V Kombarov، نويسنده , , A.P.، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 1999
Pages
6
From page
221
To page
226
Abstract
It is proved that if all Fσ-sets in the product X × Y are δ-normal, then either X is normal and countably paracompact or all countable subsets of Y are closed. If the product X × Y is hereditarily δ-normal, then either X is perfectly normal or all countable subsets of Y are closed. Applications to exp(X), Cp(X) and products are given.
Keywords
Countable paracompactness , Normality , Exponential space , F?-?-normality , Cartesian products , Hereditary ?-normality , Space of all continuous real-valued functions , Perfect normality
Journal title
Topology and its Applications
Serial Year
1999
Journal title
Topology and its Applications
Record number
1579337
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