Zobrazeno 1 - 10
of 601
pro vyhledávání: '"Juhasz, I."'
Autor:
Juhász, I., van Mill, J.
We call a function $f: X\to Y$ $P$-preserving if, for every subspace $A \subset X$ with property $P$, its image $f(A)$ also has property $P$. Of course, all continuous maps are both compactness- and connectedness-preserving and the natural question a
Externí odkaz:
http://arxiv.org/abs/1801.06212
We call a space $X$ {\it weakly linearly Lindel\"of} if for any family $\mathcal{U}$ of non-empty open subsets of $X$ of regular uncountable cardinality $\kappa$, there exists a point $x\in X$ such that every neighborhood of $x$ meets $\kappa$-many e
Externí odkaz:
http://arxiv.org/abs/1610.04506
In this paper we first formulate several ``combinatorial principles'' concerning kappa \times omega matrices of subsets of omega and prove that they are valid in the generic extension obtained by adding any number of Cohen reals to any ground model V
Externí odkaz:
http://arxiv.org/abs/math/9605211
Autor:
Juhász, I., Soukup, Lajos
Publikováno v:
Topology Appl. 69 (1996), no. 3, 227--250
Improving a result of M. Rabus we force a normal, locally compact, 0-dimensional,Frechet-Uryson, initially omega_1-compact and non-compact space X of size omega_2 having the following property: for every open (or closed) set A in X we have |A|
Externí odkaz:
http://arxiv.org/abs/math/9505203
We show that all finite powers of a Hausdorff space X do not contain uncountable weakly separated subspaces iff there is a c.c.c poset P such that 1_P forces that ``X is a countable union of 0-dimensional subspaces of countable weight.'' We also show
Externí odkaz:
http://arxiv.org/abs/math/9503208
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^om
Externí odkaz:
http://arxiv.org/abs/math/9401203
Akademický článek
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Publikováno v:
In Neuroscience Applied 2023 2 Supplement 2
Akademický článek
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