Reu 2007
نویسنده
چکیده
Example 3.1.4. Let G be a directed graph and suppose vertex v has indegree k and outdegree `, i. e., k edges end at v and ` edges start at v. Each of these k+ ` edges will represent a vertex in the directed line graph ~ L(G), and since the terminus of each of the former k edges is the initial point of each of the latter `, in the line graph each of the former will have an edge directing to each of the latter, so we shall have a (directed) complete bipartite graph ~ Kk,` in ~ L(G).
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