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<p>of the set of <a href="page.php?w=natural_number">natural number</a>s. This modern mathematical conception of the quantitative infinite developed in the late 19th century from works by Cantor, <a href="page.php?w=Gottlob_Frege">Gottlob Frege</a>, <a href="page.php?w=Richard_Dedekind">Richard Dedekind</a> and others--using the idea of collections or sets.</p>

<p>Dedekind's approach was essentially to adopt the idea of <a href="page.php?w=one-to-one_correspondence">one-to-one correspondence</a> as a standard for comparing the size of sets, and</p><p>
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