Application in graph theory

In graph theory, models and drawings often consist mostly of vertices, edges, and labels. So, it may be possible to use a simpler language to generate a diagram of a graph.

How to do it...

The tkz-graph package offers a convenient interface. We will create a diagram with it as follows:

1. Begin with any document class:

   \documentclass{standalone}

2. Load the tkz-graph package:

   \usepackage{tkz-graph}

3. Specify a basic style:

   \GraphInit[vstyle = Shade]

4. Customize element styles as desired using standard TikZ syntax:

   \tikzset{
     LabelStyle/.style = { rectangle, rounded corners,
                           draw, minimum width = 2em,
                           fill = yellow!50,
                           text = red, font = \bfseries },
     VertexStyle/.append style = { inner sep=5pt,
                                   font = \Large\bfseries},
     EdgeStyle/.append style = {->, bend left} }

5. Begin the document:

   \begin{document}

6. Start a tikzpicture environment:

   \begin{tikzpicture}

7. Set the distance between...