As of Version 10, most of the functionality of the Combinatorica package is built into the Wolfram System. >>

is an option that can take on values True or False. This can be used in ShowGraph to display or suppress vertex numbers.


  • VertexNumber functionality is now available in the built-in Wolfram Language function VertexLabels.
  • To use VertexNumber, you first need to load the Combinatorica Package using Needs["Combinatorica`"].
  • By default, the vertex numbers are hidden.
  • VertexNumber can be set as part of the graph data structure or in ShowGraph.