What makes a space have large weight?
I. Juhász, Lajos Soukup, Z. Szentmiklóssy
Abstract
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 2omega with w(X)=2omega and nw(X)=omega, we show that CH implies the existence of a 0-dimensional space Y of size omega1 with w(Y)=nw(Y)=omega1 and chi(Y)=R(Y)=omega, and we prove that it is consistent that 2omega is as large as you wish and there is a 0-dimensional space Z of size 2omega such that w(Z)=nw(Z)=2omega but chi(Z)=R(Zomega)=omega.
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