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<p>iterations of the function  acting on itself.</p>

<p>The average number of 1st neighbors, , is  and the average number of 2nd neighbors is: </p>

<p><big> Degree distribution for directed networks </big></p>
<p>In a directed network, each node has some in-degree  and some out-degree  which are the number of links which have run into and out of that node respectfully. If  is the probability that a randomly chosen node has in-degree  and out-degree  then the generating function assigned to this <a href="page.php?w=joint_probability_distribution">joint probability distribution</a></p><p>
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