- #36
PAllen
Science Advisor
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atyy said:How do you get from there to the Einstein equation G=T?
The ADM mass and Komar mass seem closer to the notion of gravitational mass as invariant mass. But the stress energy tensor seems closer to the notion of gravitational mass as energy.
I don't know. I was only speaking to what plays a role of inertia in SR, not an approach for motivating stress energy tensor. If you don't use 4 vectors, how do you conclude which is the real inertia: longitudinal relativistic mass or transverse?
Maybe get to T via flows of 4-momentum, which brings energy and spatial momentum in together.