Computational Challenges with Cliques, Quasi-cliques and Clique Partitions in Graphs
During the last decade, many problems in social, biological, and financial networks require finding cliques, or quasi-cliques. Cliques or clique partitions have also been used as clustering or classification tools in data sets represented by networks. These networks can be very large and often massive and therefore external (or semi-external) memory algorithms are needed. We discuss four applications where we identify computational challenges which are both of practical and theoretical interest.
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