L-Ultrafilters, L-Sets and LC-Property
Mathematica Moravica, Tome 11 (2007) no. 1.

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An L-filter base, L-filter, L-ultrafilter is a filter base, filter, ultrafilter consisting exclusively of Lindelöf sets. In this paper we consider L-filters (ultrafilters) and LC-property. A space X is LC − space if every Lindelöf 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.
Mots-clés : L-set, LC-space, LC-extensions 
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     title = {L-Ultrafilters, {L-Sets} and {LC-Property}},
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Dušan Milovančević. L-Ultrafilters, L-Sets and LC-Property. Mathematica Moravica, Tome 11 (2007) no. 1. https://geodesic-test.mathdoc.fr/item/MM3_2007_11_1_a8/