Forcing with matrices of countable elementary submodels
Forcing with matrices of countable elementary submodels
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使用可数基本子模型矩阵进行强制
DOI:
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发表时间:
2015
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通讯作者:
S. Todorcevic
中科院分区:
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作者:
Boriša Kuzeljević;S. Todorcevic
We analyze the forcing notion $mathcal P$ of finite matrices whose rows consists of isomorphic countable elementary submodels of a given structure of the form $H_{ heta}$. We show that forcing with this poset adds a Kurepa tree $T$. Moreover, if $mathcal P_c$ is a suborder of $mathcal P$ containing only continuous matrices, then the Kurepa tree $T$ is almost Souslin, i.e. the level set of any antichain in $T$ is not stationary in $omega_1$.