The structure of Valdivia compact lines

Details The structure of Valdivia compact lines The structure of Valdivia compact lines

2008-11-25

arxiv.org/abs/0811.4144v2

Mathematics

General Topology

18 pages

Scientific paper

We study linearly ordered spaces which are Valdivia compact in their order topology. We find an internal characterization of these spaces and we present a counter-example disproving a conjecture posed earlier by the first author. The conjecture asserted that a compact line is Valdivia compact if its weight does not exceed aleph one, every point of uncountable character is isolated from one side and every closed first countable subspace is metrizable. It turns out that the last condition is not sufficient. On the other hand, we show that the conjecture is valid if the closure of the set of points of uncountable character is scattered. This improves an earlier result of the first author.

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