relation: http://eprints.imtlucca.it/1084/
title: Hypergraph topological quantities for tagged social networks
creator: Zlatic, Vinko
creator: Ghoshal, Gourab
creator: Caldarelli, Guido
subject: QA75 Electronic computers. Computer science
subject: QC Physics
description: Recent years have witnessed the emergence of a new class of social networks, which require us to move beyond previously employed representations of complex graph structures. A notable example is that of the folksonomy, an online process where users collaboratively employ tags to resources to impart structure to an otherwise undifferentiated database. In a recent paper, we proposed a mathematical model that represents these structures as tripartite hypergraphs and defined basic topological quantities of interest. In this paper, we extend our model by defining additional quantities such as edge distributions, vertex similarity and correlations as well as clustering. We then empirically measure these quantities on two real life folksonomies, the popular online photo sharing site Flickr and the bookmarking site CiteULike. We find that these systems share similar qualitative features with the majority of complex networks that have been previously studied. We propose that the quantities and methodology described here can be used as a standard tool in measuring the structure of tagged networks.
publisher: American Physical Society
date: 2009-09
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: http://eprints.imtlucca.it/1084/1/PhysRevE.Caldarelli_2009.pdf
identifier:   Zlatic, Vinko and Ghoshal, Gourab and Caldarelli, Guido  Hypergraph topological quantities for tagged social networks.  Physical Review E, 80 (3).   ISSN 1539-3755      (2009)  
relation: http://dx.doi.org/10.1103/PhysRevE.80.036118
relation: 10.1103/PhysRevE.80.036118