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The main result of this paper is the proof of the simultaneous consistency, modulo a weakly compact cardinal, of the equality with the following property () of partitions of pairs of : \smallskip () For any coloring (or partition) either there is a homogeneous set of size in color or there is a set such that for every countable there is for which and for all . \smallskip (*) plus together then imply that for every topological space of countable spread, i.e. not containing any uncountable discrete subset, if it is Hausdorff and if it is also infinite and regular. Here denotes the number of all open subsets of .

生成讲解博客的中文版本

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