What is the Formula for Computing Surface Metric on a PF Surface?

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SUMMARY

The discussion focuses on computing the surface metric on a PF surface using the formula $$ \frac{1}{\sqrt g}\frac{\partial}{\partial u^\mu}\left( \sqrt g g^{\mu v} \frac{\partial \eta(s,\phi)}{\partial u^v} \right). $$ The variables involved include the determinant of the metric, represented as $$\sqrt g = \csc^2\alpha \sin s$$ and the metric tensor $$g = \begin{bmatrix} \csc^2\alpha &0\\ 0 & \csc^2\alpha\sin^2 s \end{bmatrix}$$. The user successfully resolved their query without needing further assistance.

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member 428835
Hi PF!

I'm trying to compute

$$
\frac{1}{\sqrt g}\frac{\partial}{\partial u^\mu}\left( \sqrt g g^{\mu v} \frac{\partial \eta(s,\phi))}{\partial u^v} \right)
$$

where I found

$$
\sqrt g = \csc^2\alpha \sin s\\
g =
\begin{bmatrix}
\csc^2\alpha &0\\
0 & \csc^2\alpha\sin^2 s
\end{bmatrix}
$$

where ##\mu,v = 1,2##. Can someone help me out here? I can link the paper I'm reading this from if it helps, but I think I've communicated everything relevant.
 
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Can anyone point me in a direction where I could figure out how to compute the above?
 
Nevermind, I got it
 

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