### PCF without choice

by Shelah. [Sh:835]

We mainly investigate model of set theory, e.g., ZF + DC + ``the
family of countable subsets of lambda is well ordered for every
lambda'' (really local version for a given lambda). In this
frame much of pcf theory can be generalized. E.g., there is a class
of regular cardinals, and we can prove cardinal inequality.

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