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<p>are not self-intersecting and have no holes, the vertices of a visibility graph are connected by edges that represent the sides and diagonals of a polygon. The vertices are defined as the point locations. <a href="page.php?w=Polyhedral_graph">Polyhedral graph</a> is an undirected graph that forms the vertices and edges of a three-dimensional <a href="page.php?w=convex_polyhedron">convex polyhedron</a>. In order to achieve it, such a graph must meet the requirements of <a href="page.php?w=Steinitz%27s_theorem">Steinitz's theorem</a>, stating that</p><p>
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