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<p>square root.</p>

<p>Square roots of negative numbers can be discussed within the framework of <a href="page.php?w=complex_number">complex number</a>s. More generally, square roots can be considered in any context in which a notion of the "<a href="page.php?w=square_%28algebra%29">square</a>" of a mathematical object is defined. These include <a href="page.php?w=function_space">function space</a>s and <a href="page.php?w=square_matrices">square matrices</a>, among other <a href="page.php?w=mathematical_structure">mathematical structure</a>s.</p>

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