Local clustering aims to identify a cluster within a given graph that includes a designated seed node or a significant portion of a group of seed nodes. This cluster should be well-characterized, i.e., it has a high number of internal edges and a low number of external edges. In this work, we propose SOCIAL, a novel algorithm for local motif clustering which optimizes for motif conductance based on a local hypergraph model representation of the problem and an adapted version of the max-flow quotient-cut improvement algorithm (MQI). In our experiments with the triangle motif, SOCIAL produces local clusters with an average motif conductance 1.7% lower than the state-of-the-art, while being up to multiple orders of magnitude faster.
@InProceedings{chhabra_et_al:LIPIcs.ESA.2023.34, author = {Chhabra, Adil and Fonseca Faraj, Marcelo and Schulz, Christian}, title = {{Faster Local Motif Clustering via Maximum Flows}}, booktitle = {31st Annual European Symposium on Algorithms (ESA 2023)}, pages = {34:1--34:16}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-295-2}, ISSN = {1868-8969}, year = {2023}, volume = {274}, editor = {G{\o}rtz, Inge Li and Farach-Colton, Martin and Puglisi, Simon J. and Herman, Grzegorz}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ESA.2023.34}, URN = {urn:nbn:de:0030-drops-186871}, doi = {10.4230/LIPIcs.ESA.2023.34}, annote = {Keywords: local motif clustering, motif conductance, maximum flows, max-flow quotient-cut improvement} }
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