Title of article :
Canonical structure in the universe of set theory: part two
Author/Authors :
Cummings، نويسنده , , James and Foreman، نويسنده , , Matthew and Magidor، نويسنده , , Menachem، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
21
From page :
55
To page :
75
Abstract :
We prove a number of consistency results complementary to the ZFC results from our paper [J. Cummings, M. Foreman, M. Magidor, Canonical structure in the universe of set theory: part one, Annals of Pure and Applied Logic 129 (1–3) (2004) 211–243]. We produce examples of non-tightly stationary mutually stationary sequences, sequences of cardinals on which every sequence of sets is mutually stationary, and mutually stationary sequences not concentrating on a fixed cofinality. We also give an alternative proof for the consistency of the existence of stationarily many non-good points, show that diagonal Prikry forcing preserves certain stationary reflection properties, and study the relationship between some simultaneous reflection principles. Finally we show that the least cardinal where square fails can be the least inaccessible, and show that weak square is incompatible in a strong sense with generic supercompactness.
Keywords :
Good ordinal , Internally approachable structure , Approachable ordinal , Square sequence , Precipitous ideal , Covering properties , Mutual stationarity , Tight structure , Stationary reflection , PCF theory
Journal title :
Annals of Pure and Applied Logic
Serial Year :
2006
Journal title :
Annals of Pure and Applied Logic
Record number :
1443802
Link To Document :
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