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<p>this definition.</p>

<p>Every <a href="page.php?w=distance-transitive_graph">distance-transitive graph</a> is distance regular.  Indeed, distance-regular graphs were introduced as a combinatorial generalization of distance-transitive graphs, having the numerical regularity properties of the latter without necessarily having a large <a href="page.php?w=Graph_automorphism">automorphism group</a>.</p>

<p><big>Intersection arrays</big></p>
<p>The <b>intersection array</b> of a distance-regular graph is the array  in which  is the diameter of the graph and</p><p>
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