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Green function

  1. Jul 7, 2011 #1
    In Jackson's ED book, he mentioned eq. 2.18 is essentially the same as eq. 2.5. What I don't understand is that in eq. 2.18 it is the position of the unit source to be differentiated while in eq. 2.5 it is the observation point. Is this O.K.?
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  3. Jul 7, 2011 #2


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    It might help if you provided the examples you were talking about. I know I don't have this book that you are referring to.
  4. Jul 8, 2011 #3


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    The two equations are for different things. That is why there are the two equations.
    (2.5) is to get the surface charge for a given potential.
    (2.18) is what is needed for the Dirichlet boundary condition using a GF.
    That is one of the (many) difficult sections of J.
    Last edited: Jul 8, 2011
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