Some Banach spaces added by a Cohen real
Some Banach spaces added by a Cohen real
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由科恩实数添加的一些巴拿赫空间
DOI:
10.1016/j.topol.2015.09.027
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发表时间:
2015
影响因子:
0.6
通讯作者:
Džamonja M
中科院分区:
文献类型:
--
作者:
Džamonja M
We study certain Banach spaces that are added in the extension by one Cohen real. Specifically, we show that adding just one Cohen real to any model adds a Banach space of density ℵ 1 which does not embed into any such space in the ground model (Theorem 1.1). Moreover, such a Banach space can be chosen to be UG (Theorem 1.6). This has consequences on the isomorphic universality number for Banach spaces of density ℵ 1, which is hence equal to ℵ 2 in the standard Cohen model and the same is true for UG spaces. Analogous universality results for Banach spaces are true for other cardinals, by a different proof (Theorem 2.10 (1)).
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影响因子:
1.3
作者:
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DOI:
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