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<a accesskey="3" href="page.php?w=biological_network&amp;p=2">3.Next</a>
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<p>A <b>biological network</b> is a method of representing systems as complex sets of binary interactions or relations between various biological entities. In general, networks or <a href="page.php?w=Graph_theory">graphs</a> are used to capture relationships between entities or objects. A network can be represented as an N×N <a href="page.php?w=Matrix_%28mathematics%29">matrix</a> where N is the number of <a href="page.php?w=Vertex_%28graph_theory%29">nodes</a>, and who's entries tell you if two nodes share an <a href="page.php?w=Glossary_of_graph_theory">edge</a>.</p><p>
<a accesskey="3" href="page.php?w=biological_network&amp;p=2">3.Next</a>
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