Corpus ID: 237490952

Another characterization of meager ideals

@inproceedings{Balcerzak2021AnotherCO,
  title={Another characterization of meager ideals},
  author={Marek Balcerzak and Szymon Gła̧b and Paolo Leonetti},
  year={2021}
}
We show that an ideal I on the positive integers is meager if and only if there exists a bounded nonconvergent real sequence x such that the set of subsequences [resp. permutations] of x which preserve the set of I-limit points is comeager and, in addition, every accumulation point of x is also an I-limit point (that is, a limit of a subsequence (xnk) such that {n1, n2, . . . , } / ∈ I). The analogous characterization holds also for I-cluster points. 

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