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Mar 26, 2023 at 15:23 comment added safesphere Differential equations are meaningless without boundary conditions. And with the boundary conditions the gravitational equations do define the full Riemann tensor.
Mar 20, 2023 at 21:55 history became hot network question
Mar 20, 2023 at 15:08 vote accept CommunityBot
Mar 20, 2023 at 14:56 history edited Qmechanic CC BY-SA 4.0
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Mar 20, 2023 at 14:47 answer added Andrew Steane timeline score: 7
Mar 20, 2023 at 14:23 comment added Prahar yes. that is what it means. The rest of the Riemann tensor is captured by the Weyl tensor and this is not fixed by Einstein's equations at all. For example, gravitational waves are described by the Weyl tensor, not by the Ricci tensor.
Mar 20, 2023 at 13:54 history asked user355398 CC BY-SA 4.0