标题： 引力和时空动力学的新视角 显示英文标题

标题： A new perspective on Gravity and the dynamics of Spacetime

摘要： 爱因斯坦-希尔伯特作用量包含一个体项和一个面项（该面项来源于对四维散度的积分）。我证明仅从面项就可以得到爱因斯坦方程。这导致了：(i) 对引力的一种新颖且完全自洽的观点，以及 (ii) 一个具体的数学框架，在该框架中，爱因斯坦方程对时空动力学的描述类似于热力学极限下连续固体的描述。 显示英文摘要

摘要： The Einstein-Hilbert action has a bulk term and a surface term (which arises from integrating a four divergence). I show that one can obtain Einstein's equations from the surface term alone. This leads to: (i) a novel, completely self contained, perspective on gravity and (ii) a concrete mathematical framework in which the description of spacetime dynamics by Einstein's equations is similar to the description of a continuum solid in the thermodynamic limit.