- #1

- 2,136

- 2,712

where,

and

After this, he proceeds to find the expression for the ##\Gamma## in ##h_{\mu\nu}##.

My question is, how does he write the terms for ##l^{\mu\nu}## and ##h_{\mu\nu}## just by looking at ##\mathcal{M}##? I am sure I am missing something, and the answer is very trivial, but since I have none to ask, I hope you will help me out.

Notation used: According to the author, bold font means a 3-vector, while normal font means a 4-vector. So, k is a 4-vector, while

**k**is the corresponding 3-vector.