Squares, ascent paths, and chain conditions

Squares, ascent paths, and chain conditions

Using a variety of square principles, we obtain results on the consistency strengths of the non-existence of kappa-Aronszajn trees with narrow ascent paths and of the infinite productivity of strong kappa-chain conditions. In particular, we show that, if kappa is an uncountable regular cardinal that is not weakly compact in L, then:
1. for every lambda

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Chris Lambie-Hanson

January 13, 2018
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