Ideals, Cohen sets and consistent extensions of the Erdős-Dushnik-Miller Theorem

Details Ideals, Cohen sets and consistent extensions of the Erdős-Dushnik-Miller Theorem Ideals, Cohen sets and consistent extensions of the Erdős-Dushnik-Miller Theorem

1997-09-15

arxiv.org/abs/math/9709228v1

Mathematics

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Scientific paper

We present two different types of models where, for certain singular cardinals lambda of uncountable cofinality, lambda -> (lambda, omega+1)^2, although lambda is not a strong limit cardinal. We announce, here, and will present in a subsequent paper, that, for example, consistently, aleph_{omega_1} not-> (aleph_{omega_1}, omega+1)^2 and consistently, 2^{aleph_0} not-> (2^{aleph_0},omega +1)^2 .

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