Maximum common edge subgraph
The maximum common edge subgraph problem on general graphs is NP-complete as it is a generalization of subgraph isomorphism: a graph is isomorphic to a subgraph of another graph if and only if the maximum common edge subgraph of and has the same number of edges as . Unless the two inputs and to the maximum common edge subgraph problem are required to have the same number of vertices, the problem is APX-hard.
- Maximum common subgraph isomorphism problem
- Subgraph isomorphism problem
- Induced subgraph isomorphism problem