Linearized inverse metric
= Linearized inverse metric
If $g_{\mu\nu}=\eta_{\mu\nu}+h_{\mu\nu}$, then $g^{\mu\nu}=\eta^{\mu\nu}-h^{\mu\nu}+O(h^2)$, with indices on $h$ raised using the background metric.
= Linearized inverse metric
If $g_{\mu\nu}=\eta_{\mu\nu}+h_{\mu\nu}$, then $g^{\mu\nu}=\eta^{\mu\nu}-h^{\mu\nu}+O(h^2)$, with indices on $h$ raised using the background metric.