More forcing notions imply diamond
More forcing notions imply diamond
复制标题
更多强迫观念意味着钻石
DOI:
10.1007/s001530050047
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发表时间:
1994
影响因子:
0.3
通讯作者:
S. Shelah
中科院分区:
文献类型:
--
作者:
A. Roslanowski;S. Shelah
Abstract.We prove that the Sacks forcing collapses the continuum onto
${\frak d}$, answering the question of Carlson and Laver. Next we prove that if a proper forcing of the size at most continuum collapses
$\omega_2$ then it forces
$\diamondsuit_{\omega_{1}}$.