I'm studying hermitian operators and in the equations it keeps using a * after a function i.e. f(x)*(adsbygoogle = window.adsbygoogle || []).push({});

I don't understand what it means and how it's used and why they keep moving it all around the equation....I know it's probably pretty easy and I just missed it in lecture but it's driving me crazy.

pleeeese help!

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# What does * mean and how is it used

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