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- Kinematics for time-like congruences.
- Ideal and spin fluid.
- Newman-Penrose formalism.
- Gravitational equations for the theory with arbitrary gravitational Lagrangian in Riemann and Riemann-Cartan spaces.
The detailed documentation including complete manual and short reference guide is provided.
GRG is free of charge.
The address for correspondence:
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- Kinematics for time-like congruences.
- Ideal and spin fluid.
- Newman-Penrose formalism.
- Gravitational equations for the theory with arbitrary gravitational Lagrangian in Riemann and Riemann-Cartan spaces.
The detailed documentation including complete manual and short reference guide is provided.
## Author
```text
Vadim V. Zhytnikov
Physics Department, Faculty of Mathematics,
Moscow State Pedagogical University,
Davydovskii per. 4, Moscow 107140, Russia
Telephone (Home): (095) 188-16-11
E-mail: vvzhy@td.lpi.ac.ru
E-mail: grg@curie.phy.ncu.edu.tw
Subject: for Zhytnikov
```
## License
- GRG is free of charge. See [LICENSE](https://github.com/reduce-algebra/grg/blob/master/LICENSE) for full details.
## Upstream
- [GRG Homepage](https://reduce-algebra.sourceforge.io/grg32/grg32.php)
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