I[omega_2] can be the nonstationary ideal on Cof(omega_1)

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We answer a question of Shelah by showing that it is consistent that every set of ordinals of cofinality omega_1 in I[omega_2] is nonstationary if and only if it is consistent that that there is a kappa^+ Mahlo cardinal kappa.
version 4 of the paper has been extensively revised in response to the referee report from TAMS. I expect it to appear in TAMS

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Logic, 03E35

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http://salesiana.dossiersoluciones.com/handle/123456789/128067

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0407225
 http://arxiv.org/abs/math/0407225

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arXiv