| graph_could_be_isomorphic (G1, G2) | Returns False if graphs G1 and G2 are definitely not isomorphic. |
| fast_graph_could_be_isomorphic (G1, G2) | Returns False if graphs G1 and G2 are definitely not isomorphic. |
| faster_graph_could_be_isomorphic (G1, G2) | Returns False if graphs G1 and G2 are definitely not isomorphic. |
| is_isomorphic (G1, G2) | Returns True if the graphs G1 and G2 are isomorphic and False otherwise. |
| GraphMatcher | Check isomorphism of graphs. |
| DiGraphMatcher | Check isomorphism of directed graphs. |