- #1
Mike2
- 1,313
- 0
I'm reading, General Relativity, by Robert M. Wald. On page 39 he has the following notation:
[tex]
\displaystyle{
{\rm R}_{{\rm [abc]}}^{\,\,\,\,\,\,\,\,\,\,\,\,{\rm d}} = 0
}
[/tex]
and
[tex]
\displaystyle{
\nabla _{{\rm [a}} {\rm R}_{{\rm bc]d}}^{\,\,\,\,\,\,\,\,\,\,{\rm e}} = 0
}
[/tex]
What do the square brakets [ ] mean? How can the subscript of the [tex]\nabla[/tex] be included in these brakets? I've not seen this notation in the other books I have, so I could use a little help.
Thanks.
[tex]
\displaystyle{
{\rm R}_{{\rm [abc]}}^{\,\,\,\,\,\,\,\,\,\,\,\,{\rm d}} = 0
}
[/tex]
and
[tex]
\displaystyle{
\nabla _{{\rm [a}} {\rm R}_{{\rm bc]d}}^{\,\,\,\,\,\,\,\,\,\,{\rm e}} = 0
}
[/tex]
What do the square brakets [ ] mean? How can the subscript of the [tex]\nabla[/tex] be included in these brakets? I've not seen this notation in the other books I have, so I could use a little help.
Thanks.
Last edited: