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arXiv 1306.6204gr-qc
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共形协变波动方程组及其与爱因斯坦场方程的等价性

Conformally covariant systems of wave equations and their equivalence to Einstein's field equations

Tim-Torben Paetz

摘要:

我们推导出,在3+1时空维,两个替代系统的准线性波动方程,弗里德里希的共形场方程的基础上。当初始数据满足适当的约束方程时,我们分析了它们与爱因斯坦真空场方程的等价性。作为应用,将具有过去零无穷远数据的Einstein方程的特征初值问题化为具有普通光锥数据的波动方程的特征初值问题.

英文摘要:

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.

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