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<a accesskey="3" href="page.php?w=Pythagorean_quadruple&amp;p=2">3.Next</a>
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<p>A <b>Pythagorean quadruple</b> is a <a href="page.php?w=tuple">tuple</a> of <a href="page.php?w=integer">integer</a>s , , , and , such that . They are solutions of a <a href="page.php?w=Diophantine_equation">Diophantine equation</a> and often only positive integer values are considered. However, to provide a more complete geometric interpretation, the integer values can be allowed to be negative and zero (thus allowing <a href="page.php?w=Pythagorean_triple">Pythagorean triple</a>s to be included) with the only condition being that . In this</p><p>
<a accesskey="3" href="page.php?w=Pythagorean_quadruple&amp;p=2">3.Next</a>
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