Hi folks.(adsbygoogle = window.adsbygoogle || []).push({});

Hope that you can help me.

I have an equation, that has been rewritten, and i dont see how:

has been rewritten to:

Can someone explain me how?

Or can someone just tell me if this is correct in tensor notation:

σ_{ij,j}ζu_{i}= (σ_{ij}ζu_{i})_{,j}

really hope, that someone can help me

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# Tensor Notation and derivatives

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