Abstract.
We force and construct a model in which level by level equivalence between strong compactness and supercompactness holds, along with certain additional combinatorial properties. In particular, in this model, ♦ δ holds for every regular uncountable cardinal δ, and below the least supercompact cardinal κ, □ δ holds on a stationary subset of κ. There are no restrictions in our model on the structure of the class of supercompact cardinals.
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The author wishes to thank the referee for numerous helpful comments and suggestions, which have considerably improved the presentation of the material contained herein. The author also wishes to thank Andreas Blass, the corresponding editor, for a useful suggestion, and Grigor Sargsyan for a very helpful conversation on the subject matter of this paper.
Mathematics Subject Classification (2000): 03E35, 03E55
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Apter, A. Diamond, square, and level by level equivalence. Arch. Math. Logic 44, 387–395 (2005). https://doi.org/10.1007/s00153-004-0252-0
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DOI: https://doi.org/10.1007/s00153-004-0252-0