On the cofinality of ultrapowers
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Publication:4262579
DOI10.2307/2586495zbMath0930.03060arXivmath/9611210OpenAlexW2032346220MaRDI QIDQ4262579
Heike Mildenberger, Andreas Blass
Publication date: 15 February 2000
Published in: Journal of Symbolic Logic (Search for Journal in Brave)
Full work available at URL: https://arxiv.org/abs/math/9611210
cardinal characteristics of the continuumgroupwise density numbersplitting numberfiltersultrafiltersreduced powerscofinalities of ultrapowers of the natural numbersunsplitting number
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Cites Work
- Cofinalities of countable ultraproducts: The existence theorem
- Near coherence of filters. I: Cofinal equivalence of models of arithmetic
- There may be simple \(P_{\aleph _ 1}\)- and \(P_{\aleph _ 2}\)-points and the Rudin-Keisler ordering may be downward directed
- Countable ultraproducts without CH
- Non-isomorphic hyper-real fields from non-isomorphic ultrapowers
