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VoG: Summarizing and Understanding Large Graphs

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Vreeken,  Jilles
Databases and Information Systems, MPI for Informatics, Max Planck Society;

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arXiv:1406.3411.pdf
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Citation

Koutra, D., Kang, U., Vreeken, J., & Faloutsos, C. (2014). VoG: Summarizing and Understanding Large Graphs. Retrieved from http://arxiv.org/abs/1406.3411.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-49A3-F
Abstract
How can we succinctly describe a million-node graph with a few simple sentences? How can we measure the "importance" of a set of discovered subgraphs in a large graph? These are exactly the problems we focus on. Our main ideas are to construct a "vocabulary" of subgraph-types that often occur in real graphs (e.g., stars, cliques, chains), and from a set of subgraphs, find the most succinct description of a graph in terms of this vocabulary. We measure success in a well-founded way by means of the Minimum Description Length (MDL) principle: a subgraph is included in the summary if it decreases the total description length of the graph. Our contributions are three-fold: (a) formulation: we provide a principled encoding scheme to choose vocabulary subgraphs; (b) algorithm: we develop \method, an efficient method to minimize the description cost, and (c) applicability: we report experimental results on multi-million-edge real graphs, including Flickr and the Notre Dame web graph.