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The weight and i-weight of Lindelof P-groups
被引:0
|作者:
Tkachenko, Mikhail
[1
]
机构:
[1] Univ Autonoma Metropolitana, Dept Matemat, Ave San Rafael Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico
关键词:
Lindelof;
P-space;
Weight;
i-Weight;
t-Stable;
Pseudo-N-1-compact;
Free topological group;
TOPOLOGICAL-GROUPS;
CHARACTER;
D O I:
10.1007/s40879-023-00670-9
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We show that fora regular P-space X, the pseudo-N-1-compactness of X is equivalent to the pseudo-N-1-compactness of the free topological group F(X) on X. This fact is applied to deduce that every regular pseudo -N-1-compact P-space is N-1-stable. Also, we calculate the exact value of the weight of F(X), for a Lindelof P-space X, in terms of the i-weight of the space X. Using the partially ordered set ([t](w), subset of), for an uncountable cardinal t, we present a nontrivial relationship between the weight and i-weight of an arbitrary Lindelof P-group.
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页数:11
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