articulation_points

0th

Percentile

Articulation points of a graph

Articuation points or cut vertices are vertices whose removal increases the number of connected components in a graph.

Keywords
graphs
Usage
articulation_points(graph)
Arguments
graph

The input graph. It is treated as an undirected graph, even if it is directed.

Details

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.

Value

A numeric vector giving the vertex ids of the articulation points of the input graph.

See Also

biconnected_components, components, is_connected, vertex_connectivity

Aliases
  • articulation_points
  • articulation.points
Examples
# NOT RUN {
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)
# }
Documentation reproduced from package igraph, version 1.2.2, License: GPL (>= 2)

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