English

Parametrized Ramsey theory of infinite block sequences of vectors

Combinatorics 2020-06-19 v2 Functional Analysis Logic

Abstract

We show that the infinite-dimensional versions of Gowers' FINk\mathrm{FIN}_k and FIN±k\mathrm{FIN}_{\pm k} theorems can be parametrized by an infinite sequence of perfect subsets of 2ω2^\omega. To do so, we use ultra-Ramsey theory to obtain exact and approximate versions of a result which combines elements from both Gowers' theorems and the Hales-Jewett theorem. As a consequence, we obtain a parametrized version of Gowers' c0c_0 theorem.

Keywords

Cite

@article{arxiv.2006.06496,
  title  = {Parametrized Ramsey theory of infinite block sequences of vectors},
  author = {Jamal K. Kawach},
  journal= {arXiv preprint arXiv:2006.06496},
  year   = {2020}
}

Comments

21 pages; fixed typos and clarified terminology