Editing Graph (discrete mathematics) (section)

== Graph operations ==
{{main|Graph operations}}
There are several operations that produce new graphs from initial ones, which might be classified into the following categories:
* ''unary operations'', which create a new graph from an initial one, such as:
** [[edge contraction]],
** [[line graph]],
** [[dual graph]],
** [[complement graph]],
** [[graph rewriting]];
* ''binary operations'', which create a new graph from two initial ones, such as:
** [[disjoint union of graphs]],
** [[cartesian product of graphs]],
** [[tensor product of graphs]],
** [[strong product of graphs]],
** [[lexicographic product of graphs]],
** [[series–parallel graph]]s.