On the cofinality of the splitting number

作者：Dow Alan^*; Shelah Saharon

来源：Indagationes Mathematicae, 2018, 29(1): 382-395.

DOI：10.1016/j.indag.2017.01.010

• Splitting number
• Cardinal invariants of the continuum
• Matrix forcing

The splitting numbers can be singular. The key method is to construct a forcing poset with finite support matrix iterations of ccc posets introduced by Blass and Shelah (1989).

• 出版日期2018-2
• 单位rutgers