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<a accesskey="3" href="page.php?w=graph_automorphism&amp;p=2">3.Next</a>
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<p>In the mathematical field of <a href="page.php?w=graph_theory">graph theory</a>, an <b>automorphism</b> of a <a href="page.php?w=Graph_%28discrete_mathematics%29">graph</a> is a form of <a href="page.php?w=symmetry">symmetry</a> in which the graph is <a href="page.php?w=Map_%28mathematics%29">mapped</a> onto itself while preserving the edge-<a href="page.php?w=Vertex_%28graph_theory%29">vertex</a> connectivity.</p>

<p>Formally, an automorphism of a graph  is a <a href="page.php?w=permutation">permutation</a>  of the vertex set , such that the</p><p>
<a accesskey="3" href="page.php?w=graph_automorphism&amp;p=2">3.Next</a>
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