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Hi,

Im reading an article (The meaning of einstein's equation : http://math.ucr.edu/home/baez/einstein/node6a.html" [Broken] )

and cant understand the development of one of the equations, the equation is attached as an image, I cant understand the transition from the left side of the equation to the middle.

Can anyone help?

Thanks.

Im reading an article (The meaning of einstein's equation : http://math.ucr.edu/home/baez/einstein/node6a.html" [Broken] )

and cant understand the development of one of the equations, the equation is attached as an image, I cant understand the transition from the left side of the equation to the middle.

Can anyone help?

Thanks.

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