Find the articulation points (AP), the 1-order articulation points (1-AP) and weak points of a graph.
a connected igraph graph
connectedness type for directed graphs : "weak" or "strong". Ignored for undirected graphs
Articulation points are determined with the
A 1-order articulation point is an articulation point which generates a component of cardinal 1 when removed.
A weak point is a singleton component of a graph when one of its 1-order articulation points is removed.
A list with 3 elements :
ap is a character vector of articulation points names
ap_1 is a character vector of 1-order articulation points names
wp is a character vector of weak points names
Monique Dalud-Vincent, Michel Fors<c3><a9>, Jean-Paul Auray, "An algorithm for finding the structure of social groups", Social Networks, 16 (1994) 137-162.
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