  CARTAN is an easy-to-use symbolic, tensor component package based on the
popular Mathematica program. CARTAN makes use of the powerful formalism of
rigid frames, and can return results both in this frame and in the coordinate
basis. CARTAN has predefined functions for computation of tensors such as
Riemann, Ricci, Einstein, Weyl, as well as other tensors and invariants. CARTAN
works for spaces with curvature and/or torsion with any constant signature and
for any number of dimensions. A free copy of CARTAN 1.01 for Unix with the
installation program is contained in the file CARTAN.FILES.uu. The
documentation is found in CARTAN.DOC.uu. The program has built-in Help
functions.
