Directed acyclic graphs are DAGs
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@ -5,7 +5,8 @@ In this chapter, we focus on two classes of directed graphs:
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\begin{itemize}
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\item \key{Acyclic graphs}:
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There are no cycles in the graph,
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so there is no path from any node to itself.
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so there is no path from any node to itself\footnote{Directed acyclic
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graphs are sometimes called DAGs.}.
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\item \key{Successor graphs}:
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The outdegree of each node is 1,
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so each node has a unique successor.
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