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Kronecker Delta and vector form of q_(i,j) q_(m,mj)

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Romik
#1
Dec5-12, 03:18 PM
P: 14
guys,

we know ∇q=qi,j and ∇ ∇.q=qi,ij

but what will happen if we have qi,jqm,mj ? (sum on j)

I know some terms of ∇q∇ ∇.q will drop due to that summation. so the question is what is the right expression in vector form for that term.

thanks
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