The null graph or the empty graph is the graph with no points and no lines. The null graph is the initial object in the category of graphs.

See also

• Glossary of graph theory

References

• Harary, F. and Read, R., "Is the Null Graph a Pointless Concept?", Graphs and Combinatorics Conference, George Washington University, Springer-Verlag, New York, NY, 1973.

Graph theory | Data structures