Several formulas for projections of the Riemann and Ricci tensors parallel or normal to a hypersurface with spacelike or timelike unit normal.

Notices where this attachment appears

1. Robert McNees (mcnees@mastodon.social)'s status on Thursday, 31-Aug-2023 17:53:13 UTC Robert McNees

   Significant update to my reference page on "Conventions, Definitions, Identities, and Formulas.”

   Changes to:
   * Hypersurfaces with a spacelike or timelike unit normal
   * Small variations of the metric

   This is a collection of useful results for folks working in gravitational physics and high-energy theory. It's a repository for things I frequently need, and includes some explicit results which (as far as I am aware) do not appear anywhere in the literature.

   http://jacobi.luc.edu/Useful.html