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<a accesskey="3" href="page.php?w=directed_graph&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=mathematics">mathematics</a>, and more specifically in <a href="page.php?w=graph_theory">graph theory</a>, a <b>directed graph</b> (or <b>digraph</b>) is a <a href="page.php?w=Graph_%28discrete_mathematics%29">graph</a> that is made up of a set of <a href="page.php?w=Vertex_%28graph_theory%29">vertices</a> connected by directed <a href="page.php?w=Edge_%28graph_theory%29">edges</a>, often called <b>arcs</b>.</p>

<p><big>Definition</big></p>
<p>In formal terms, a directed graph is an ordered pair 1=''G'' = (''V'', ''A'') where<br/>
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<a accesskey="3" href="page.php?w=directed_graph&amp;p=2">3.Next</a>
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