English

Continuous projections onto ideal convergent sequences

Functional Analysis 2018-11-21 v1 General Topology

Abstract

Let IP(ω)\mathcal{I}\subseteq\mathcal{P}(\omega) be a meager ideal. Then there are no continuous projections from \ell_\infty onto the set of bounded sequences which are I\mathcal{I}-convergent to 00. In particular, it follows that the set of bounded sequences statistically convergent to 00 is not isomorphic to \ell_\infty.

Cite

@article{arxiv.1811.08206,
  title  = {Continuous projections onto ideal convergent sequences},
  author = {Paolo Leonetti},
  journal= {arXiv preprint arXiv:1811.08206},
  year   = {2018}
}

Comments

5pp, no figures

R2 v1 2026-06-23T05:22:02.142Z