What makes a space have large weight?
逻辑
2008-02-03 v1
摘要
We formulate several conditions (two of them are necessary and sufficient) which imply that a space of small character has large weight. In section 3 we construct a ZFC example of a first countable 0-dimensional space X of size 2^omega with w(X)=2^omega and nw(X)=omega, we show that CH implies the existence of a 0-dimensional space Y of size omega_1 with w(Y)=nw(Y)=omega_1 and chi(Y)=R(Y)=omega, and we prove that it is consistent that 2^omega is as large as you wish and there is a 0-dimensional space Z of size 2^omega such that w(Z)=nw(Z)=2^omega but chi(Z)=R(Z^omega)=omega.
引用
@article{arxiv.math/9401203,
title = {What makes a space have large weight?},
author = {I. Juhász and Lajos Soukup and Z. Szentmiklóssy},
journal= {arXiv preprint arXiv:math/9401203},
year = {2008}
}