Differences From Artifact [a9363ee6c7]:

To Artifact [b55da4bd58]:


26
27
28
29
30
31
32
33
34

35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50




51
52
53
26
27
28
29
30
31
32


33

34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55







-
-
+
-















+
+
+
+



- 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.

## Author
The address for correspondence:

```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)

GRG for REDUCE
GRG Homepage | GitHub Mirror | SourceHut Mirror | NotABug Mirror | Chisel Mirror | Chisel RSS ]