xPPN: tensor algebra for the PPN formalism

Description

xPPN is an implementation of the parametrized post-Newtonian formalism using xAct for Mathematica.

Installation

1. Install xAct.
2. Inside the xAct installation folder, clone the xPPN repository:

   git clone https://github.com/xenos1984/xPPN.git

3. Load the package in Mathematica:

   << xAct`xPPN`

Running the examples

1. Open any file from the Examples folder (with extension wl) in Mathematica.
2. Choose "Run All Code" to execute the contents.

Documentation

• xPPN: An implementation of the parametrized post-Newtonian formalism using xAct for Mathematica, arXiv:2012.14984 [gr-qc].
• Presentation at Space Science @ Drop Tower Seminar - 2. September 2020.

Further information

The parametrized post-Newtonian formalism

• Clifford M. Will, Theory and experiment in gravitational physics (Cambridge University Press, 1993).
• Clifford M. Will, The Confrontation between General Relativity and Experiment, Living Rev. Rel. 17, 4 (2014), arXiv:1403.7377 [gr-qc].
• Clifford M. Will, Theory and Experiment in Gravitational Physics (Cambridge University Press, 2018).

xAct

• José M. Martín-García, xAct: Efficient tensor computer algebra for the Wolfram Language.