From The Free On-line Dictionary of Computing (19 January 2023): GRG A computer algebra system for differential geometry, gravitation and field theory. Version 3.1 works with PSL-based REDUCE 3.3 or 3.4. E-mail: V.V. Zhytnikov <vvzhy@phy.ncu.edu.tw>. (1994-12-16)
GRG
A computer algebra system for differential geometry, gravitation and field theory. Version 3.1 works with PSL-based REDUCE 3.3 or 3.4.
E-mail: V.V. Zhytnikov <vvzhy@phy.ncu.edu.tw>.
(1994-12-16)