Could someone please explain the partial and covariant derivatives with upstairs index that appears all of a sudden in Wald in section 4.2 with no explanation? I haven't seen it anywhere else.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

(n,m)→(n+1,m) derivatives

2. Relevant equations

section 4.2--when the stress tensor is introduced, with downstairs indexes

3. The attempt at a solution

it was mentioned earlier by Wald; just didn't see it

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# (n,m) to (n+1,m) derivatives in Wald

**Physics Forums | Science Articles, Homework Help, Discussion**