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<p>space consists of a <a href="page.php?w=measurable_space">measurable space</a>  together with a <a href="page.php?w=Measure_%28mathematics%29">measure</a> on it.</p>

<p><big>Example</big></p>
<p>Set . The -algebra on finite sets such as the one above is usually the <a href="page.php?w=power_set">power set</a>, which is the set of all subsets (of a given set) and is denoted by  Sticking with  this convention, we set</p>

<p>In this simple case, the power set can be written down explicitly:</p>

<p>As the measure, define  by </p>

<p>so  (by additivity</p><p>
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