I just handed in a homework where I used the assumption below(adsbygoogle = window.adsbygoogle || []).push({});

∂_{i}u_{j}∂_{j}u_{i}=0 ?

but when I start thinking about it I'm not so sure, could someone prove to me that it is zero? Or is that assumption totally off?

Regards

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# Homework Help: Question on partial derivative

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