1,633 research outputs found

    Cardinal invariants above the continuum

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    We prove some consistency results about b(lambda) and d(lambda), which are natural generalisations of the cardinal invariants of the continuum b and d. We also define invariants b_cl(lambda) and d_cl(lambda), and prove that almost always b(lambda) = b_cl(lambda) and d(lambda)=d_cl(lambda

    Logical Dreams

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    We discuss the past and future of set theory, axiom systems and independence results. We deal in particular with cardinal arithmetic

    Even more simple cardinal invariants

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    Using GCH, we force the following: There are continuum many simple cardinal characteristics with pairwise different values.Comment: a few changes (minor corrections) from first versio
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