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DTSTART;VALUE=DATE:20250521T164500
DTEND;VALUE=DATE:20250521T164500
UID:17929@agenda.unifr.ch
DESCRIPTION:A wealth of evidence shows that real-world networks are endowed \nwith the small-world property, i.e., that the maximal distance between \nany two of their nodes scales logarithmically rather than linearly \nwith their size. \nIn addition, most social networks are organized so that no individual \nis more than six connections apart from any other, an empirical regularity \nknown as the six degrees of separation. \nWhy social networks have this ultra small-world organization, whereby \nthe graph’s diameter is independent of the network size over several \norders of magnitude, is still unknown. \nI will show that the “six degrees of separation” is the property featured \nby the equilibrium state of any network where individuals weigh \nbetween their aspiration to improve their centrality and the costs \nincurred in forming and maintaining connections. \nMoreover,  the emergence of such a regularity is compatible with all \nother features, such as clustering and scale-freeness, that normally \ncharacterize the structure of social networks. \nThus, simple evolutionary rules of the kind traditionally associated with \nhuman cooperation and altruism can also account for the emergence\n of one of the most intriguing attributes of social networks. \n
SUMMARY:Why do we live in an ultra-small world :  game theory explains the emergence of the six degrees of separation 
CATEGORIES:Colloque / Congrès / Forum
LOCATION:PER 08\, 0.51\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/17929
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