Duality and the pcf theory

Details Duality and the pcf theory Duality and the pcf theory

2002-12-03

arxiv.org/abs/math/0212041v1

Mathematics

Logic

Scientific paper

We consider natural cardinal invariants hm_n and prove several duality
theorems, saying roughly: if I is a suitably definable ideal and provably
cov(I)>=hm_n, then non(I) is provably small. The proofs integrate the
determinacy theory, forcing and pcf theory.

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