Why and how does from g[tex]_{ab}[/tex]=[tex]\eta_{ab}[/tex]+h[tex]_{ab}[/tex] follow(adsbygoogle = window.adsbygoogle || []).push({});

g[tex]^{ab}[/tex]=[tex]\eta^{ab}[/tex]-h[tex]^{ab}[/tex]?

Don't get the latex right, first equation all indices are supposed to below, second equation all are supposed to be up.

thanks

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# Linearized gravity

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