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Conformally Covariant Systems of Wave Equations and their Equivalence to Einstein's Field Equations

机译:波动方程的共形协变系统及其与爱因斯坦场方程的等价关系

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摘要

We derive, in 3 + 1 spacetime dimensions, two alternative systems of quasi-linear wave equations, based on Friedrich's conformal field equations. We analyse their equivalence to Einstein's vacuum field equations when appropriate constraint equations are satisfied by the initial data. As an application, the characteristic initial value problem for the Einstein equations with data on past null infinity is reduced to a characteristic initial value problem for wave equations with data on an ordinary light-cone.
机译:我们基于弗里德里希的共形场方程,在3 + 1时空维度上推导了两个准线性波动方程的替代系统。当初始数据满足适当的约束方程时,我们分析它们与爱因斯坦真空场方程的等价性。作为应用,具有过去零无穷大的数据的爱因斯坦方程的特征初值问题被简化为具有普通光锥上的数据的波动方程的特征初值问题。

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