讲座题目：Why do we live in an ultra-small world: game theory explains the emergence of the six degrees of separation
主讲人：Stefano Boccaletti 教授
主持人：周杰 副教授
开始时间：2025-05-06 8:30:00
讲座地址：闵行校区物理楼226报告厅
主办单位：物理与电子科学学院
报告人简介：
Stefano Boccaletti received the PhD in Ph. Stefano Boccaletti is the Fellow of European Academy of Sciences. He is currently Director of Research at the Institute of Complex Systems of the Italian CNR, in Florence. His major scientific interests are i) pattern formation and competition in extended media, ii) control and synchronization of chaos, and iii) the structure and dynamics of complex networks. He is Editor in Chief of the Journal “Chaos, Solitons and Fractals” (Elsevier) from 2013, and member of the Academia Europaea since 2016. He was elected member of the Florence City Council from 1995 to 1999. Boccaletti has published 352 papers in peer-reviewed international Journals, which received more than 35,000 citations (Google Scholar). His h factor is 70 and his i-10 index is 227. With more than 12,300 citations, the monograph “Complex Networks: Structure and Dynamics”, published by Boccaletti in Physics Reports on 2006 converted into the most quoted paper ever appeared in the Annals of that Journal.
报告内容：
Most social networks are organized so that no individual is more than six connections apart from any other, an empirical regularity known as the six degrees of separation. I will show that the “six degrees of separation” is the property featured by the equilibrium state of any network where individuals weigh between their aspiration to improve their centrality and the costs incurred in forming and maintaining connections. Thus, simple evolutionary rules of the kind traditionally associated with human cooperation and altruism can also account for the emergence of one of the most intriguing attributes of social networks.
