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What is a Dirac Delta function?

  1. Dec 28, 2006 #1
    I often see this in electrodynamics in the form of a point charge density function. There are some rules on how to manipulate the thing in integrals.
    But what is it mathematically?
  2. jcsd
  3. Dec 28, 2006 #2
  4. Dec 28, 2006 #3
    arildno created a nice tutorial on this. You can find it here.
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