Accelerating network layouts using graph neural networks

Csaba Both, Nima Dehmamy, Rose Yu and Albert-László Barabási ()
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Csaba Both: Northeastern University
Nima Dehmamy: IBM Research
Rose Yu: University of California
Albert-László Barabási: Northeastern University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Graph layout algorithms used in network visualization represent the first and the most widely used tool to unveil the inner structure and the behavior of complex networks. Current network visualization software relies on the force-directed layout (FDL) algorithm, whose high computational complexity makes the visualization of large real networks computationally prohibitive and traps large graphs into high energy configurations, resulting in hard-to-interpret “hairball” layouts. Here we use Graph Neural Networks (GNN) to accelerate FDL, showing that deep learning can address both limitations of FDL: it offers a 10 to 100 fold improvement in speed while also yielding layouts which are more informative. We analytically derive the speedup offered by GNN, relating it to the number of outliers in the eigenspectrum of the adjacency matrix, predicting that GNNs are particularly effective for networks with communities and local regularities. Finally, we use GNN to generate a three-dimensional layout of the Internet, and introduce additional measures to assess the layout quality and its interpretability, exploring the algorithm’s ability to separate communities and the link-length distribution. The novel use of deep neural networks can help accelerate other network-based optimization problems as well, with applications from reaction-diffusion systems to epidemics.

Date: 2023
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DOI: 10.1038/s41467-023-37189-2

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