English

Infinite Games and Ramsey Properties of $F_\sigma$ Ideals

Logic 2025-02-07 v4

Abstract

In this work, we investigate various combinatorial properties of Borel ideals on countable sets. We extend a theorem presented in M. Hru\v{s}\'{a}k, D. Meza-Alc\'antara, E. Th\"ummel, and C. Uzc\'ategui, \emph{Ramsey Type Properties of Ideals}, and identify an FσF_\sigma tall ideal in which player II has a winning strategy in the Cut and Choose Game, thereby addressing a question posed by J. Zapletal. Additionally, we explore the Ramsey properties of ideals, demonstrating that the random graph ideal is critical for the Ramsey property when considering more than two colors. The previously known result for two colors is extended to any finite number of colors. Furthermore, we comment on the Solecki ideal and identify an FσF_\sigma tall KK-uniform ideal that is not equivalent to EDfin\mathcal{ED}_{\text{fin}}, thereby addressing a question from Michael Hru\v{s}\'ak.

Keywords

Cite

@article{arxiv.1808.09088,
  title  = {Infinite Games and Ramsey Properties of $F_\sigma$ Ideals},
  author = {José de Jesús Pelayo Gómez},
  journal= {arXiv preprint arXiv:1808.09088},
  year   = {2025}
}

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34 pages