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can anyone help me with the euler lagrange equation which is stated in d'inverno chapter 11?

in equation (11.26) it is said that when we use the hilbert-einstein lagrangian we can have:

∂L/(∂g_(ab,cd) )=(g^(-1/2) )[(1/2)(g^ac g^bd+g^ad g^bc )-g^ab g^cd ]

haw can we derive this out of (11.24)?

I tried to derive ∂L/(∂g_(ab,cd) ) out of (11.24), but I really don't know how to work with (∂g_(ab,cd) ?

please help me!!!

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# Homework Help: Euler lagrange equation and einstein lagrangian

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