A Reduction in Consistency Strength for Universal Indestructibility

Volume 55 / 2007

Arthur W. Apter, Grigor Sargsyan Bulletin Polish Acad. Sci. Math. 55 (2007), 1-6 MSC: 03E35, 03E55. DOI: 10.4064/ba55-1-1


We show how to reduce the assumptions in consistency strength used to prove several theorems on universal indestructibility.


  • Arthur W. ApterDepartment of Mathematics
    Baruch College of CUNY
    New York, NY 10010, U.S.A.
    The CUNY Graduate Center, Mathematics
    365 Fifth Avenue
    New York, NY 10016, U.S.A.
  • Grigor SargsyanGroup in Logic and the Methodology of Science
    University of California
    Berkeley, CA 94720, U.S.A.

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