English

Measures and slaloms

Logic 2016-04-13 v1

Abstract

We examine measure-theoretic properties of spaces constructed using certain technique of Todor\v{c}evi\'{c}. We show that the existence of strictly positive measures on such spaces depends on combinatorial properties of certain families of slaloms. As a corollary we get that if add(N)=non(M)\mathrm{add}(\mathcal{N}) = \mathrm{non}(\mathcal{M}) then there is a non-separable space which supports a measure and which cannot be mapped continuously onto [0,1]ω1[0,1]^{\omega_1}. Also, without any additional axioms we prove that there is a non-separable growth of ω\omega supporting a measure and that there is a compactification LL of ω\omega with growth of such properties and such that the natural copy of c0c_0 is complemented in C(L)C(L). Finally, we discuss examples of spaces not supporting measures but satisfying quite strong chain conditions. Our main tool is a characterization due to Kamburelis of Boolean algebras supporting measures in terms of their chain conditions in generic extensions by a measure algebra.

Keywords

Cite

@article{arxiv.1604.03137,
  title  = {Measures and slaloms},
  author = {Piotr Borodulin-Nadzieja and Tanmay Inamdar},
  journal= {arXiv preprint arXiv:1604.03137},
  year   = {2016}
}

Comments

25 pages

R2 v1 2026-06-22T13:29:48.867Z