PCF without choice

Details PCF without choice PCF without choice

2005-10-11

arxiv.org/abs/math/0510229v2

Mathematics

Logic

Scientific paper

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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