I have seen two definitions with oposite signs (for one of the pressure terms in the formula) all over the web and books. I suspect it is related to the chosen metric signature, but I found no references to that.(adsbygoogle = window.adsbygoogle || []).push({});

General Relativity An Introduction for Physicists from M. P. HOBSON, G. P. EFSTATHIOU and A. N. LASENBY uses a negative sign.

Wald uses a positive sign..

And so on..

What's happening?

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# Stress-energy tensor definition

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