I'm reading Hobson, Efstathiou and Lasenby, where on page 490, some notation is used that I am not familiar with.(adsbygoogle = window.adsbygoogle || []).push({});

In the rather long equation (17.62), some terms contain things like

[itex] \partial_{(\mu} h^{\rho}_{\nu)} [/itex].

The author(s) then says "where we have made use of the symmetrisation notation discussed in Chapter 4."

I've tried looking in Chapter 4 but it's not at all clear what is going on, so I came here :)

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# 'Symmetrisation Notation' - What is it?

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