Infinite dimensional Ellentuck spaces and Ramsey-classification theorems
Abstract
We extend the hierarchy of finite-dimensional Ellentuck spaces to infinite dimensions. Using uniform barriers on as the prototype structures, we construct a class of continuum many topological Ramsey spaces which are Ellentuck-like in nature, and form a linearly ordered hierarchy under projection. We prove new Ramsey-classification theorems for equivalence relations on fronts, and hence also on barriers, on the spaces , extending the Pudlak-Rodl Theorem for barriers on the Ellentuck space. The inspiration for these spaces comes from continuing the iterative construction of the forcings to the countable transfinite. The -closed partial order is forcing equivalent to , which forces a non-p-point ultrafilter . The present work forms the basis for further work classifying the Rudin-Keisler and Tukey structures for the hierarchy of the generic ultrafilters .
Cite
@article{arxiv.1508.06533,
title = {Infinite dimensional Ellentuck spaces and Ramsey-classification theorems},
author = {Natasha Dobrinen},
journal= {arXiv preprint arXiv:1508.06533},
year = {2015}
}
Comments
36 pages, submitted, (very slightly revised exposition)