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http://en.wikipedia.org/wiki/Helmholtz_decomposition#Derivation

how do we go from

to

also on the next step

∇' just means the gradient with respect to r', right?

Also, why do i have to use the dirac delta function? i thought it was only used to deal with discontinuities?

also when we say

the volume integral of a vector field just means we do the triple integral on each component of the vector field independently right?

how do we go from

to

also on the next step

∇' just means the gradient with respect to r', right?

Also, why do i have to use the dirac delta function? i thought it was only used to deal with discontinuities?

also when we say

the volume integral of a vector field just means we do the triple integral on each component of the vector field independently right?

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