论文标题
双重弱点
Double weakness
论文作者
论文摘要
我们证明，始终存在一个弱但不可访问的基本$λ$，序列$ \ langle 2^θ：θ<λ\ rangle $最终并不恒定，而弱钻石则在$λ$中失败。我们还证明，钻石始终是失败的，但是弱钻石的参数化版本以某种难以接近的$λ$保持。
We prove that, consistently, there exists a weakly but not strongly inaccessible cardinal $λ$ for which the sequence $\langle 2^θ:θ<λ\rangle$ is not eventually constant and the weak diamond fails at $λ$. We also prove that consistently diamond fails but a parametrized version of weak diamond holds at some strongly inaccessible $λ$.
