Covarient maxwell

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1. Feb 23, 2015

jennyjones

can some tell me why the second line follows from the first in the attachment

thank you

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2. Feb 23, 2015

Orodruin

Staff Emeritus
It doesn't. The two sides of the equation have different free indices.

3. Feb 23, 2015

jennyjones

thanx!

4. Feb 23, 2015

Matterwave

For some reason they have mad a swap $\mu\leftrightarrow\nu$ in the second line...and also switch the order of the partial derivatives.