Kerr-Schild
1. History
2. Topology
3. Metrics and coordinates
The Kerr-Schild metrics are all of the form
$$g_{\mu\nu} = \eta_{\mu\nu} + H k_\mu k_\nu $$with $k$ a null vector ($g_{\mu\nu} k^\mu k^\nu = 0$)
The Kerr-Schild metrics are all of the form
$$g_{\mu\nu} = \eta_{\mu\nu} + H k_\mu k_\nu $$with $k$ a null vector ($g_{\mu\nu} k^\mu k^\nu = 0$)