SHEEP
A package for {symbolic mathematics},
especially {tensor analysis} and General Relativity, developed
by Inge Frick in Stockholm in the late 1970s to early 1980s.
SHEEP was implemented in {DEC-10} {assembly language}, then in
several {LISPs}. The current version runs on {Sun}-3 and is
based on {Portable Standard LISP}.
["Sheep, a Computer Algebra System for General Relativity",
J.E.F. Skea et al in Proc First Brazilian School on Comp Alg,
W. Roque et al eds, Oxford U Press 1993, v2].
{(ftp://galois.maths.gmw.ac.uk/homeftp/pub/sheep)}
(1998-05-06)