Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] adlm_v1_0.tar.gz(173 Kbytes)
Manuscript Title: The Riegeom package: abstract tensor calculation.
Authors: R. Portugal
Program title: Riegeom
Catalogue identifier: ADLM_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 126(2000)261
Programming language: Maple V Release 4 or 5.
Computer: Pentium II, 400 MHz.
Operating system: Windows98, Unix.
Word size: 32
Keywords: Tensor, Riemannian geometry, Abstract calculation, General relativity, Symmetry, Maple, Computer algebra, Astrophysics, Gravitational systems.
Classification: 1.5, 5.

Nature of problem:
Simplification of tensor expressions and tensor manipulation in the indicial format. Useful for calculations in General Relativity and Riemannian Geometry.

Solution method:
Canonical form for tensor expressions and fast algorithms for tensor simplification.

Restrictions:
Computer memory.

Running time:
The timing for finding the canonical form of a Riemann tensor monomial of degree 4 is around 1 second in a Pentium II, 400 Mhz running Windows98.