Title of article :
Two properties of weaker than the Fréchet Urysohn property
Author/Authors :
Sakai، نويسنده , , Masami، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2006
Pages :
10
From page :
2795
To page :
2804
Abstract :
For a Tychonoff space X, we denote by C p ( X ) the space of all real-valued continuous functions on X with the topology of pointwise convergence. In this paper, we study the κ-Fréchet Urysohn property and the weak Fréchet Urysohn property of C p ( X ) . Our main results are that (1) C p ( X ) is κ-Fréchet Urysohn iff X has property ( κ ) (i.e. every pairwise disjoint sequence of finite subsets of X has a strongly point-finite subsequence). In particular, if C p ( X ) is a Baire space, then it is κ-Fréchet Urysohn; (2) among separable metrizable spaces, every λ-space has property ( κ ) and every space having property ( κ ) is always of the first category; (3) every analytic space has the ω-grouping property, hence for every analytic space X, C p ( X ) is weakly Fréchet Urysohn.
Keywords :
Function space , Fréchet Urysohn , ?-Fréchet Urysohn , Weakly Fréchet Urysohn , ?-Cover , Property (?) , Property ( ? ) , Strongly point-finite , ?-space , Always of the first category , ?-grouping property , Topology of pointwise convergence
Journal title :
Topology and its Applications
Serial Year :
2006
Journal title :
Topology and its Applications
Record number :
1580934
Link To Document :
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