xTras: a field-theory inspired xAct package for Mathematica

2013/08/15 by Teake Nutma · 1 citation
Computer Science · Physics and Astronomy · #cs.SC #cs.MS #gr-qc #hep-th

paper · pdf · doi:10.1016/j.cpc.2014.02.006

published as Comput. Phys. Commun. 185 (2014) 1719-1738 · 29 pages. The package can be downloaded from http://www.xact.es/xtras/

arxiv created 2013/08/15 · arxiv updated 2014/05/22

Abstract

We present the tensor computer algebra package xTras, which provides functions and methods frequently needed when doing (classical) field theory. Amongst others, it can compute contractions, make Ansätze, and solve tensorial equations. It is built upon the tensor computer algebra system xAct, a collection of packages for Mathematica.

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• Quadratic gravity with propagating torsion and asymptotic freedom