论文标题
条件较小的难读性
Unthreadability with Small Conditions
论文作者
论文摘要
我们介绍了一个强迫,该强迫添加了$ \ square(\ aleph_2,\ aleph_0)$ - 序列在CH下具有可数条件的序列。假设弱紧凑的红衣主教的一致性,我们可以通过新的poset找到强迫延伸,其中$ \ square(\ aleph_2,<\!\ aleph_0)$和$ \ square _ {\ aleph_1,\ aleph_1,\ alleph_0} $在强迫扩展中失败。
We introduce a forcing that adds a $\square(\aleph_2,\aleph_0)$-sequence with countable conditions under CH. Assuming the consistency of a weakly compact cardinal, we can find a forcing extension by our new poset in which both $\square(\aleph_2,<\!\aleph_0)$ and $\square_{\aleph_1,\aleph_0}$ fail in the forcing extension.