How special is your Aronszajn tree?

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The following is consistent: There is a stationary set S such that every Aronszajn tree is S-*-special and there is an Aronszajn tree T such that for every unbounded E we have T is not E-special. This answers a question of Shelah (Proper and Improper Forcing, IX.4.9(5).

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Logic, 03E35

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http://salesiana.dossiersoluciones.com/handle/123456789/69700

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0312445
 http://arxiv.org/abs/math/0312445

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arXiv