Title of article
An α4 , not Fréchet product of α4 Fréchet spaces
Author/Authors
Costantini، نويسنده , , Camillo and Simon، نويسنده , , Petr، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 2000
Pages
10
From page
43
To page
52
Abstract
We shall construct in ZFC two Fréchet–Urysohn α4 -spaces, the product of which is α4 , but fails to be Fréchet–Urysohn. This answers Noguraʹs question from 1985.
Keywords
Fréchet–Urysohn space , ?4 -space , Almost disjoint family , Convergent sequence
Journal title
Topology and its Applications
Serial Year
2000
Journal title
Topology and its Applications
Record number
1579638
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