Resolvability of spaces having small spread or extent
General Topology
2007-05-23 v1 Logic
Abstract
In a recent paper O. Pavlov proved the following two interesting resolvability results: (1) If a space satisfies then is maximally resolvable. (2) If a -space satisfies then is -resolvable. Here () denotes the smallest successor cardinal such that has no discrete (closed discrete) subset of that size and is the smallest cardinality of a non-empty open set in . In this note we improve (1) by showing that can be relaxed to . In particular, if is a space of countable spread with then is maximally resolvable. The question if an analogous improvement of (2) is valid remains open, but we present a proof of (2) that is simpler than Pavlov's.
Keywords
Cite
@article{arxiv.math/0609091,
title = {Resolvability of spaces having small spread or extent},
author = {Istvan Juhasz and Lajos Soukup and Zoltan Szentmiklossy},
journal= {arXiv preprint arXiv:math/0609091},
year = {2007}
}