@article{Ravsky_Banakh_2022, title={Bounds on the extent of a topological space}, volume={57}, url={http://matstud.org.ua/ojs/index.php/matstud/article/view/274}, DOI={10.30970/ms.57.1.62-67}, abstractNote={<p>The extent $e(X)$ of a topological space $X$ is the supremum of sizes of closed discrete subspaces of $X$. Assuming that $X$ belongs to some class of topological spaces, we bound $e(X)$ by<br>other cardinal characteristics of $X$, for instance Lindel\"of number, spread or density.</p&gt;}, number={1}, journal={Matematychni Studii}, author={Ravsky, A. and Banakh, T.}, year={2022}, month={Mar.}, pages={62-67} }