IndexGraph

IndexGraph[g] replaces the vertices of the graph g by its vertex indices.

• IndexGraph[g, r] replaces the vertices with integers r, r+1, ....
• IndexGraph[{v -> w, ...}, ...] uses rules v -> w to specify the graph g.

Examples

Convert to indexed graph:

IndexGraph[Graph[{a -> b, b -> c, c -> a}]]

Start from a different index:

IndexGraph[graph, 10]

Please visit the official Wolfram Language Reference for more details.