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Chirp! is a GNU Social instance for the Cooley and Sekula families and their friends.

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The table of contents reads: Table of Contents 1. Curvature Tensors 2. Differential Forms 3. Lie Derivatives 4. Euler Densities 5. Hypersurface Formed by a Spacelike or Timelike Vector 6. Sign Conventions for the Action 7. Hamiltonian Formulation for Evolution Along a Spatial Direction 8. Conformal Transformations 9. Small Variations of the Metric 10. The ADM Decomposition 11. Converting to ADM Variables

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

    In conversation about a year ago from mastodon.social permalink
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Chirp! is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.

Creative Commons Attribution 3.0 All Chirp! content and data are available under the Creative Commons Attribution 3.0 license.