Optimal Laplacian Regularization For Sparse Spectral Community Detection
Lorenzo Dall'Amico, Nicolas Tremblay, Romain Couillet
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04 May 2020
Regularization of the classical Laplacian matrices was empirically shown to improve spectral clustering in sparse networks. It was observed that small regularizations are preferable, but this point was left as a heuristic argument. In this paper we formally determine a proper regularization which is intimately related to alternative state-of-the-art spectral techniques for sparse graphs.
