Why is the concept of divergence defined to be the sum of the partial derivatives of the x, y and z(adsbygoogle = window.adsbygoogle || []).push({}); componentsof a vector fieldEwith respect to x, y and z, instead of being defined as the sum of the partial derivatives ofEitself with respect to x, y and z? What would this operation I just defined measure, and why is it not defined nor employed?

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# Why is the divergence like that?

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