# R igraph manual pages

Use this if you are using igraph from R

## Isomorphism class of a graph

### Description

The isomorphism class is a non-negative integer number. Graphs (with the same number of vertices) having the same isomorphism class are isomorphic and isomorphic graphs always have the same isomorphism class. Currently it can handle only graphs with 3 or 4 vertices.

### Usage

isomorphism_class(graph, v)


### Arguments

 graph The input graph. v Optionally a vertex sequence. If not missing, then an induced subgraph of the input graph, consisting of this vertices, is used.

### Value

An integer number.

Other graph isomorphism: count_isomorphisms, count_subgraph_isomorphisms, graph_from_isomorphism_class, isomorphic, isomorphisms, subgraph_isomorphic, subgraph_isomorphisms

### Examples

# create some non-isomorphic graphs
g1 <- graph_from_isomorphism_class(3, 10)
g2 <- graph_from_isomorphism_class(3, 11)
isomorphism_class(g1)
isomorphism_class(g2)
isomorphic(g1, g2)


[Package igraph version 1.2.4 Index]