Hi. I was looking for a chain rule in vector calculus for taking the gradient of a function such as f(A), where A is a vector and f is a scalar function. I found the following expression on wikipedia, but I don't understand it. It's taking the gradient of f, and applying that to A, and then writing nabla A ?? Can anyone tell me what's going on?(adsbygoogle = window.adsbygoogle || []).push({});

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# Vector calculus chain rule

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