We show that given omega many supercompact cardinals, there is a generic extension in which there are no Aronszajn trees at N omega+1. This is an improvement of the large cardinal assumptions. The previous hypothesis was a huge cardinal and a many supercompact cardinals above it, in Magidor-Shelah [7].
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Korea Inst Adv Study KIAS, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South KoreaKorea Inst Adv Study KIAS, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South Korea
Ahn, JinHoo
Kim, Joonhee
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Yonsei Univ, Dept Math, 50 Yonsei-ro, Seoul 03722, South KoreaKorea Inst Adv Study KIAS, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South Korea
Kim, Joonhee
Lee, Junguk
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Korea Adv Inst Sci &Technol KAIST, Dept Math Sci, 291 Daehak-ro, Daejeon 34141, South KoreaKorea Inst Adv Study KIAS, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South Korea
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Korea Inst Adv Study, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South KoreaKorea Inst Adv Study, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South Korea
Ahn, Jinhoo
Kim, Joonhee
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Korea Inst Adv Study, Sch Math, 85 Hoegiro, Seoul 02455, South KoreaKorea Inst Adv Study, Sch Computat Sci, 85 Hoegiro, Seoul 02455, South Korea