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<p>is a finite or infinite sequence of edges which joins a sequence of distinct vertices, but with the added restriction that the edges be all directed in the same direction.</p>

<p>Paths are fundamental concepts of graph theory, described in the introductory sections of most graph theory texts. See e.g. , , or .  cover more advanced <a href="page.php?w=algorithm">algorithm</a>ic topics concerning paths in graphs.</p>

<p><big> Definitions </big></p>
<p><big> Walk, trail, and path </big></p>
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* A <b>walk</b> is a finite or infinite <a href="page.php?w=sequence">sequence</a></p><p>
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