I have the task to derive the electromagnetic energy stress tensor. I'm pretty new to the tensor index notation and I have a problem with an occuring derivative.
I have to verify that ∂L∂(∂μAλ)=−Fμλ with L=−12(∂μAν∂μAν−∂μAν∂νAμ)
Can someone please show me step by step how to do this derivative? I understand the tensor notation itself but I have problems to understand such a derivative, especially when I have a term like ∂(∂μAν)∂(∂σAλ).
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