Journal of Symbolic Logic

Applications of PCF Theory

Saharon Shelah

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We deal with several pcf problems: we characterize another version of exponentiation: maximal number of $\kappa$-branches in a tree with $\lambda$ nodes, deal with existence of independent sets in stable theories, possible cardinalities of ultraproducts and the depth of ultraproducts of Boolean Algebras. Also we give cardinal invariants for each $\lambda$ with a pcf restriction and investigate further T$_D$(f). The sections can be read independently, although there are some minor dependencies.

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J. Symbolic Logic, Volume 65, Issue 4 (2000), 1624-1674.

First available in Project Euclid: 6 July 2007

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Shelah, Saharon. Applications of PCF Theory. J. Symbolic Logic 65 (2000), no. 4, 1624--1674.

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