Abstract
We consider simplified representation theorems in pcf-theory and, in particular, we prove that if \({\aleph_{\omega}^{\aleph_{0}} > \aleph_{\omega_{1}}\cdot2^{\aleph_{0}}}\) then there are cofinally many sequences of regular cardinals such that \({\aleph_{\omega_{1}+1}}\) is represented by these sequences modulo the ideal of finite subsets, using a topological approach to the pcf-structure.
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Supported by the Portuguese Foundation for Science and Technology, ref. BD\16650\2004.
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Pereira, L. Applications of the topological representation of the pcf-structure. Arch. Math. Logic 47, 517–527 (2008). https://doi.org/10.1007/s00153-008-0098-y
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DOI: https://doi.org/10.1007/s00153-008-0098-y