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The initial segment condition for $\kappa^+$-supercompactness

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arxiv 2306.13827 v3 pith:Y6PFM6I6 submitted 2023-06-24 math.LO

classification math.LO
keywords kappamiceconditionextendersfineinitiallevelsegment
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abstract

We give a development of the fine structure of mice with long extenders, to the level of $\kappa^+$-supercompact cardinals $\kappa$. We do this using a hierarchy with features more analogous to those familiar in the short extender context than the hierarchies introduced by Woodin and by Neeman-Steel. In particular, the mice we consider satisfy stronger versions of the initial segment condition. We establish a form of fine structural condensation involving embeddings $\pi:H\to M$ which need not be the identity below the projectum of $H$ (under special assumptions). We also adapt the analysis of the Dodd structure of short extenders on the sequence to mice at this level.

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  1. Full normalization for $\kappa^+$-supercompactness

    math.LO 2025-06 conditional novelty 6.0 of 10

    Normalization of iteration stacks is proved for mice at the level of kappa-plus-supercompactness, under condensation assumptions.

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