• 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