Use this if you are using igraph from R
Articuation points or cut vertices are vertices whose removal increases the number of connected components in a graph.
articulation_points(graph)
graph |
The input graph. It is treated as an undirected graph, even if it is directed. |
Articuation points or cut vertices are vertices whose removal increases the number of connected components in a graph. If the original graph was connected, then the removal of a single articulation point makes it undirected. If a graph contains no articulation points, then its vertex connectivity is at least two.
A numeric vector giving the vertex ids of the articulation points of the input graph.
Gabor Csardi csardi.gabor@gmail.com
biconnected_components, components,
is_connected, vertex_connectivity
g <- disjoint_union( make_full_graph(5), make_full_graph(5) ) clu <- components(g)$membership g <- add_edges(g, c(match(1, clu), match(2, clu)) ) articulation_points(g)