Some consequences of MA + ¬wKH
Some consequences of MA + ¬wKH
复制标题
MA + ØwKH 的一些后果
DOI:
10.1016/0166-8641(81)90020-1
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发表时间:
1981
影响因子:
0.6
通讯作者:
S. Todorcevic
中科院分区:
文献类型:
--
作者:
S. Todorcevic
Let wKH denote the following statement: There exists a ω1-tree of power ω1with >ω1ω1-branches. First, using methods of [6] and [13], we shall prove theconsistency of MA + ¬wKH. Then we shall prove that MA + ¬wKH implies the following: (a) There is no θ-dense (splitting) poset of power ω1; (b) Every LOTS of density ω1has a θ-disjoint π-base; (c) There is no Baire LOTS of power ω1without isolated points; (d) Every perfectly normal non-Archimedian space of weight ω1is metrizable. These results are connected to problems from [4], [10], [7] and [15], respectively. A part of these results was announced in [17].