Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Jakob, Hannes"'
Autor:
Jakob, Hannes
We define forcing orders which add witnesses to the failure of various forms of Friedman's Property. These posets behave similarly to the forcing order adding a nonreflecting stationary set but have the advantage of allowing the construction of maste
Externí odkaz:
http://arxiv.org/abs/2411.01478
Autor:
Jakob, Hannes
We construct models in which there are stationarily many structures that exhibit different variants of internal approachability at different levels. This answers a question of Foreman. We also show that the approachability property at $\mu$ is consis
Externí odkaz:
http://arxiv.org/abs/2404.18571
Autor:
Jakob, Hannes, Levine, Maxwell
Krueger showed that PFA implies that for all regular $\Theta \ge \aleph_2$, there are stationarily many $[H(\Theta)]^{\aleph_1}$ that are internally club but not internally approachable. From countably many Mahlo cardinals, we force a model in which,
Externí odkaz:
http://arxiv.org/abs/2404.15230
Autor:
Jakob, Hannes
We obtain a relatively simple criterion for when a forcing has the ${<}\,\delta$-approximation property, generalizing a result of Unger. Afterwards we apply this criterion to construct variants of Mitchell Forcing in order to answer questions posed b
Externí odkaz:
http://arxiv.org/abs/2401.13446
Autor:
Jakob, Hannes
We introduce strong distributivity, a strengthening of distributivity, which implies preservation of ccness and stationarity, afterwards showing a stronger version of the Easton Lemma. We also introduce a new framework for working with arbitrary orde
Externí odkaz:
http://arxiv.org/abs/2309.01986
Publikováno v:
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood; 1995, Vol. 49 Issue 6, p505-511, 7p
Autor:
Erlacher, Kurt, Görgl, R., Keckes, Jozef, Jakob, Hannes F., Bruegemann, L., Doppler, P., Bergmann, A., Leitner, Heinz, Marsoner, S., Fratzl, Peter
Publikováno v:
Materials Science Forum; January 2004, Vol. 443 Issue: 1 p155-158, 4p
Publikováno v:
Materials Science Forum; January 2003, Vol. 414 Issue: 1 p411-418, 8p