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
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