- `RS = gauss (A,B)`

Compute solution of system of linear equation using gaussian elimination
algorithm.

The argument `A` is a square matrix representing equations coeficients and `B`
representing equation result.

This algorithm is adapted from the first reference.

See also: `lu`, `plu`.

### References

- https://github.com/itsravenous/gaussian-elimination
- https://mathworld.wolfram.com/GaussianElimination.html
- https://en.wikipedia.org/wiki/Gaussian_elimination