Why is it impossible to find ALL of einstein's equations in one place? well I suppose its irrelevant, I'd just like to know what math I have to do to define the energy-momentum tensor for a partical if I know say... its energy and momentum, or is that illegal? I'm struggling to grasp general relativity, from a mathematical standpoint; I get it philosophically, help please :((adsbygoogle = window.adsbygoogle || []).push({});

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# Coupled nonlinear partial differential equations or simple matrices?

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