Strongly connected components-Algorithm for finding the strongly connected components of a graph

02/15/2018

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by   Vlad-Andrei Munteanu, et al.

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A directed graph G (V, E) is strongly connected if and only if, for a pair of vertices X and Y from V, there exists a path from X to Y and a path from Y to X. In Computer Science, the partition of a graph in strongly connected components is represented by the partition of all vertices from the graph, so that for any two vertices, X and Y, from the same partition, there exists a path from X to Y and a path from Y to X and for any two vertices, U and V, from different partition, the property is not met. The algorithm presented below is meant to find the partition of a given graph in strongly connected components in O (numberOfNodes + numberOfEdges * log* (numberOfNodes)), where log* function stands for iterated logarithm.