Null Tetrad

g_(ij)=[0 1 0 0; 1 0 0 0; 0 0 0 -1; 0 0 -1 0].

It can be expressed as

See also

Tetrad

Explore with Wolfram|Alpha

More things to try:

References

d'Inverno, R. Introducing Einstein's Relativity. Oxford, England: Oxford University Press, pp. 248-249, 1992.

Referenced on Wolfram|Alpha

Cite this as:

Weisstein, Eric W. "Null Tetrad." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/NullTetrad.html

Subject classifications