Detectability of the spectral method for sparse graph partitioning

by Tatsuro Kawamoto (Tokyo Institute of Technology)

Wednesday 21 Oct 2015, 14:00 → 16:00 Europe/Rome

Aula Careri (Dip. di Fisica - Edificio G. Marconi)

We show that modularity maximization with the resolution parameter offers a unifying framework of graph partitioning. In this framework, we demonstrate that the spectral method exhibits universal detectability, irrespective of the value of the resolution parameter, as long as the graph is partitioned. Furthermore, we show that when the resolution parameter is sufficiently small, a first-order phase transition occurs, resulting in the graph being unpartitioned. arXiv: http://arxiv.org/abs/1509.06484