- #1

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I'm trying to read a set of notes on the standard model and the author states the following equality without any explanation:

[tex]-u^{-1}(\partial_\mu u)u^{-1} = \partial_\mu(u^{-1}), [/tex]

u is here a NxN representation of some continuous gauge group and is a function over spacetime.

Does this equality hold and in that case why?

Thanks!

// Kontilera