beta（N）的character谱
The character spectrum of beta(N)
摘要：
我们显示的一致性：作为Ω上某些超滤子的特征的正则基数集可以是相当混乱的，特别是不仅可以不是凸的，而且可以有许多间隙。我们还讨论了Ω上超滤子的π-特征标集。
英文摘要：
We show the consistency of: the set of regular cardinals which are the character of some ultrafilter on omega can be quite chaotic, in particular not only can be not convex but can have many gaps. We also deal with the set of pi-characters of ultrafilters on omega.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
