by Inge Frick in Stockholm in the late 1970s to early 1980s.
several
LISPs. The current version runs on
Sun-3 and is
["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].
(2002-12-28)