grad(A*B)=(A*grad)B + (B*grad)A + A curl B + B curl A(adsbygoogle = window.adsbygoogle || []).push({});

i'm not sure how to read the RHS to begin to work out the index definition.i'm thinking if add and subtract terms this will work out. i think i can see the first two terms, but the last two maybe "A cross nabla" is what they mean acting on B componentwise, otherwise it doesnt mean anything to me.

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# Vector identity

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