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Integration by parts problem involving vector functions

  1. Aug 9, 2013 #1

    I am trying to chew through the proof of reciprocity in MRI. At some point I come across to the following expression:


    Now it says that by using integration by parts (where surface term can be ignored for finite current sources), and using vector identity, [itex]\vec{A}\cdot\left(\vec{B}\times\vec{C}\right)=-\left(\vec{A}\times\vec{C}\right)\cdot\vec{B}[/itex], we get


    Can someone explain to me how to use integration by parts in this case and what does ignoring surface term mean in this context?
  2. jcsd
  3. Aug 9, 2013 #2
    This link is helpful.
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