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1. Robert McNees (mcnees@mastodon.social)'s status on Tuesday, 11-Jun-2024 16:42:11 UTC Robert McNees

   Are you a physicist, mathematician, or enthusiastic amateur who often works with curvature tensors, hypersurfaces, and other concepts that show up in GR, high energy theory, and related fields?

   Sick and tired of dropping a minus sign or factor of 2?

   Fed up with hunting through references to find how the extrinsic curvature changes under a small perturbation of the metric?

   Check out my recently updated collection of Conventions, Definitions, Identities, and Formulas:
   http://jacobi.luc.edu/Useful.html

   • Robert McNees (mcnees@mastodon.social)'s status on Tuesday, 11-Jun-2024 16:45:24 UTC Robert McNees

     in reply to

     Let me know if spot an error (not likely!), think of an interesting addition, or use this reference while working on a project -- published or otherwise.

     If you do publish something that references this page, there are instructions for adding a citation via BibTeX or REVTeX.

   • Robert McNees (mcnees@mastodon.social)'s status on Tuesday, 11-Jun-2024 16:56:55 UTC Robert McNees

     in reply to

     Notably, the section on hypersurfaces formed by a unit vector has been expanded to include both the spacelike and timelike cases. The same goes for the corresponding parts of the section on small variations of the metric.

     There are a few results in here that I use quite often, that afaik don't show up anywhere else. (At least not in this form, which is suited to the sorts of calculations that come up in my field.)