SHEEP (symbolic computation system) 2687374 189472019 2008-02-06T10:41:39Z Lantonov 2533541 [[WP:AWB/T|Typo fixing]] using [[Project:AutoWikiBrowser|AWB]] '''SHEEP''' is one of the earliest [[computer algebra system|symbolic computation systems]]. It is specialized for computations with [[tensor]]s, and was designed for the needs of researchers working with [[general relativity]] and other theories involving extensive tensor calculus computations. SHEEP is an [[open source]] [[freeware]] package (copyrighted, but free for educational and research use). The name "SHEEP" is pun on the [[Lisp Algebraic Manipulator]] or ''LAM'' on which SHEEP is based. The package was written by Inge Frick, using earlier work by Ian Cohen and [[Ray d'Inverno]]. [[Jan E. Åman]] wrote an important package in SHEEP to carry out the [[Cartan-Karlhede algorithm]]. Unfortunately, this software works only on certain rather old computers and old and proprietary operating systems. A more recent version of SHEEP, written by Jim Skea, runs under Cambridge Lisp, which is also used for [[REDUCE (computer algebra system)|REDUCE]]. ==See also== *[[GRTensorII]] ==External links== *[ftp://euclid.maths.qmw.ac.uk/pub/sheep/ SHEEP download] at [[Queen Mary, University of London]] [[Category:Free computer algebra systems]] [[Category:Tensors]] {{relativity-stub}}