报告题目：Why are there six degrees of separation in a social network?

报告人👩🏻‍🚀：Stefano Boccaletti 教授

主持人：管曙光 教授

报告时间📪：6月16日上午10:00

报告地点：闵行校区物理楼226报告厅

报告人简介：

Stefano Boccaletti教授，欧洲科光辉平台院士，意大利国家科光辉平台复杂系统研究所常务研究主任，以色列特拉维夫大学名誉教授，以色列魏兹曼科学研究院访问科学家主要从事复杂网络、系统同步🫲🦝、非线性动力学🤘🏿、大数据光电物理学、认知神经科学、混沌控制相关的基础和交叉学科领域研究，在《Physics Reports》《Physical Review Letters》《Physical Review E》 《Science Advances》《PNAS》《Nature Physics》《Nature Communications》《Nature Scientific Reports》等国际SCI杂志发表论文402篇，总引用数超过34000次，H指数62i-10指数221😰，2006年发表在《Physics Reports》上的论文《Complex Networks: Structure and Dynamics》被引用超过12000次😞，并为该期刊年鉴上被引用次数最多的论文🤽🏼‍♂️。

报告摘要：

The story coined the expression ‘six degrees of separation’ to reflect the idea that all people of the world are six or fewer social connections apart from each other. A clear explanation of the mechanisms through which social networks organize into ultra-small world states (where the diameter does not depend on the system size over several orders of magnitude) is, however, still missing. In my talk, I will show that the mechanism behind such observed regularity can be found in a dynamic evolution of the network. Therefore, evolutionary rules of the kind traditionally associated with human cooperation and altruism can in fact account also for the emergence of such a famous attribute of social networks.