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L-ultrafilters, L-sets and Lc-property
(naslov ne postoji na srpskom)
Sažetak
(ne postoji na srpskom)
An L-filter base, L-filter, L-ultrafilter is a filter base, filter, ultra filter consisting exclusively of Lindelof sets. In this paper we consider L-filters (ultrafilters) and LC-property. A space X is LC - space if every Lindelof set in X has the compact closure in X. A locally compact space X is LC - space if and only if every L-ultrafilter on X converges. We also consider L-points, L-sets and LC-extensions.
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Reference
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