期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 177, 期 8, 页码 640-648出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cpc.2007.05.015
关键词
Riemann tensor; tensor calculus; mathematica; maple; computer algebra
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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