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. Program summaryProgram title: xTrasCatalogue identifier: AESH_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AESH_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: GNU General Public License, version 3No. of lines in distributed program, including test data, etc.: 155879No. of bytes in distributed program, including test data, etc.: 565389Distribution format: tar.gzProgramming language: Mathematica.Computer: Any computer running Mathematica 6 or newer.Operating system: Linux, Unix, Windows, OS X.RAM: 100 MbClassification: 5.External routines: xACT (www.xact.es)Subprograms used:Cat IdTitleReferenceAEBH_v1_0xPermCPC 179 (2008) 597ADZK_v2_0Invar Tensor Package 2.0CPC 179 (2008) 586Nature of problem:Common problems in classical field theory: making Ansätze, computing contractions, solving tensorial equations, etc.Solution method:Various (group theory, brute-force, built-in Mathematica functions, etc.)Running time:1–60 s
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
