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SOE: Fachverband Physik sozio-ökonomischer Systeme

SOE 16: Evolutionary Game Theory and Networks (joint SOE/DY/BP)

SOE 16.1: Vortrag

Donnerstag, 19. März 2020, 15:00–15:15, GÖR 226

Game-theoretic stability and meaning of communities in networks — •Armin Pournaki, Felix Gaisbauer, Eckehard Olbrich, and Sven Banisch — Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany

Community detection is a widely used tool for observing modular structures in networks. A large variety of algorithms exist - each with their own advantages - for finding these structures based on modularity optimisation, graph-spectral methods or stochastic block modeling, to name a few.
The talk aims to provide an interpretation of such communities in relation to game-theoretic modeling. We investigate the stability of given partitions by considering coordination games on networks. In this context, we ask how many communities different network configurations support and if there are structural patterns enabling the emergence or disappearance of communities. We relate the findings to empirical data on social networks.