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Published in 2017 at "Quaestiones Mathematicae"
DOI: 10.2989/16073606.2017.1376229
Abstract: Abstract We show in the Zermelo-Fraenkel set theory ZF without the axiom of choice: Given an infinite set X, the Stone space S(X) is ultrafilter compact. For every infinite set X, every countable filterbase of…
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Keywords:
every countable;
filterbase extends;
countably compact;
infinite set ... See more keywords