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Motion4D – A library for lightrays and timelike worldlines in the theory of relativity☆ Export

Computer Physics Communications, Vol. 180, No. 11. (29 November 2009), pp. 2355-2360.

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The Motion4D-library solves the geodesic equation as well as the parallel- and Fermi–Walker-transport in four-dimensional Lorentzian spacetimes numerically. Initial conditions are given with respect to natural local tetrads which are adapted to the symmetries or the coordinates of the spacetime. Beside some already implemented metrics like the Schwarzschild and Kerr metric, the object oriented structure of the library permits to implement other metrics or integrators in a straight forward manner. Program title: Motion4D-library Catalogue identifier: AEEX_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEEX_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 150 425 No. of bytes in distributed program, including test data, etc.: 5 139 407 Distribution format: tar.gz Programming language: C++ Computer: All platforms with a C++ compiler Operating system: Linux, Unix, Windows RAM: 39 MBytes Classification: 1.5 External routines: Gnu Scientific Library (GSL) (http://www.gnu.org/software/gsl/) Nature of problem: Solve geodesic equation, parallel and Fermi–Walker transport in four-dimensional Lorentzian spacetimes. Solution method: Integration of ordinary differential equations Running time: The test runs provided with the distribution require only a few seconds to run.


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