Journal
COMPUTER PHYSICS COMMUNICATIONS
Volume 177, Issue 8, Pages 640-648Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cpc.2007.05.015
Keywords
Riemann tensor; tensor calculus; mathematica; maple; computer algebra
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The Invar package is introduced, a fast manipulator of generic scalar polynomial expressions formed from the Riemann tensor of a four-dimensional metric-compatible connection. The package can maximally simplify any polynomial containing tensor products of up to seven Riemann tensors within seconds. It has been implemented both in Mathematica and Maple algebraic systems.
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