Fast community detection by SCORE

Jiashun Jin

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Abstract:Consider a network where the nodes split into $K$ different communities. The community labels for the nodes are unknown and it is of major interest to estimate them (i.e., community detection). Degree Corrected Block Model (DCBM) is a popular network model. How to detect communities with the DCBM is an interesting problem, where the main challenge lies in the degree heterogeneity. We propose a new approach to community detection which we call the Spectral Clustering On Ratios-of-Eigenvectors (SCORE). Co ...
Cluster reduction
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10 weeks ago
Roman ▴ 15

Why does it suffice to apply some clustering algorithm such as K-means or Hierarchical clustering to the matrix of eigenvalue ratios in order to detect communities? That is, why is it that looking at the matrix of the eigenvalue ratios organizes the community data so that ordinary clustering methods can accurately detect the community structure?

Community_Detection Clustering • 60 views
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