Category:	Developer Tools
Price:	Free
Popularity:	Medium
Version String:	2.55 (8917)
Release Date:	2024-03-01
Architecture:	Intel & AppleSilicon(ARM)
Minimum OS:	macOS 10.13
Vendor Name:	Scott Brown
Homepage:	xact.scottcbrown.org

Description:

xAct:  Efficient tensor computer algebra for the Wolfram Language

xAct is a suite of free packages for tensor computer algebra in the Wolfram Language. xAct implements state-of-the-art algorithms for fast manipulations of indices and has been modelled on the current geometric approach to General Relativity. It is highly programmable and configurable. Since its first public release in March 2004, xAct has been intensively tested and has solved a number of hard problems in GR.

There are four packages acting as a kernel for the rest:
• xCore: generic programming tools
• xPerm: manipulation of large groups of permutations
• xTensor: abstract tensor computations, the flagship of the system
• xCoba: component tensor computations

Application packages include:
• xPert: high-order perturbation theory in GR
• Harmonics: tensor spherical harmonics
• Invar: polynomial invariants of the Riemann tensor
• Spinors: spinor computations in GR

Contributed packages:
• xPrint: Formatted input for xAct
• SymManipulator: Symmetrized expressions in xAct
• AVF: Exterior calculus with algebra-valued forms
• xTras: Additions to xAct
• TexAct: Tex code to format xAct expressions
• xPand: Cosmological perturbation theory
• xTerior: Exterior calculus
• SpinFrames: NP and GHP form of spinor equations

xAct is free software.