社会平衡的能源景观
The energy landscape of social balance
摘要:
我们将一个由朋友和敌人组成的紧密联系的社区建模为一个完全连接的网络,其边缘有积极和消极的标志。社会心理学的理论表明,某些符号模式比其他符号模式更稳定。这种社会“平衡”的概念使我们能够为这样的网络定义一个能源景观。它的结构是复杂的:数值实验揭示了一个景观与广泛变化的能级的局部极小值的酒窝。我们推导出严格的界限上的能量,这些地方的最小值,并证明他们有一个模块化的结构,可以用来分类。
英文摘要:
We model a close-knit community of friends and enemies as a fully connected network with positive and negative signs on its edges. Theories from social psychology suggest that certain sign patterns are more stable than others. This notion of social "balance" allows us to define an energy landscape for such networks. Its structure is complex: numerical experiments reveal a landscape dimpled with local minima of widely varying energy levels. We derive rigorous bounds on the energies of these local minima and prove that they have a modular structure that can be used to classify them.
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