GANXiS is a fast algorithm capable of detecting both disjoint and overlapping communities in social networks (undirected/directed and unweighted/weighted).  GANXiS is a general speaker-listener based information propagation process, which spreads a label at a time between nodes according to interaction rules. One advantage of GANXiS is that it does not require any knowledge about the number of community. The worst-case time complexity is O(m).  It is shown that the algorithm produces meaningful results on real-world social and gene networks.

GANXiSw v3.0.2 (download)
  • Changes and new features:
    • One single program for undirected/directed, unweighted/weighted
    • Allow to read node names or ids of any type, numeric or text string.
    • Parameter -Sym to ensure bi-directional edges (or undirected edges).
    • Parameter -seed allows to reproduce results.
    • Parameter -W allows to treat a weighted network as a unweighted network at runtime.
    • Parameter -loopfactor allows to control the running time when decomposing large communities
  •  GANXiS v1.3  (C++, only for undirected and unweighted networks, tested on networks up  to 4 million nodes)
  •  Parallel version is on the way........
Should you have any questions, feel free to send emails to or


Fast Community Detection in Social Networks.

  • C.Gaiteri,M. Chen,B. Szymanski,K. Kuzmin, J. Xie, etc, "Identifying robust communities and multi-community nodes by combining topdown and bottom-up approaches to clustering", Scientific Reports 5, 2015.
  • J. Xie, B. K. Szymanski, "LabelRankT: Incremental Community Detection in Dynamic Networks via Label Propagation", DyNetMM, New York, 2013.
  • J. Xie, B. K. Szymanski, "LabelRank: A Stabilized Label Propagation Algorithm for Community Detection in Networks", IEEE NSW, West point, NY, 2013. (arxiv,BibTex, on Media  (FrenchEnglish).
  • J. Xie, S. Kelley and B. K. Szymanski, "Overlapping Community Detection in Networks: the State of the Art and Comparative Study", ACM Computing Surveys, 2013. (Impact factor 7.8,arxiv,BibTex)
  • J. Xie and B. Szymanski, "Towards Linear Time Overlapping Community Detection in Social Networks", PAKDD 2012. (arxiv,BibTex, software )
  • J. Xie, B. K. Szymanski and X. Liu, "SLPA: Uncovering Overlapping Communities in Social Networks via A Speaker-listener Interaction Dynamic Process", IEEE ICDM workshop on DMCCI 2011, Vancouver, CA. (arxiv,BibTex,software)
  • J. Xie, B. K. Szymanski, "Community Detection Using A Neighborhood Strength Driven Label Propagation Algorithm", IEEE NSW 2011, West point, NY. (arxiv,BibTex)

Subpages (1): changelog