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Homework Help: Integrating over a delta function

  1. Nov 15, 2009 #1
    I have just integrated over one variable, x and have now got a delta function

    where m = constant * (s-s')

    now I have to integrate over either s or s' but I am a bit confused
    since if I integrate over say s then the delta function depends on s.

    Hope I have explained clearly enough, thanks for reading.
  2. jcsd
  3. Nov 16, 2009 #2
    [tex] \int ds \delta(s-s') f(s) = f(s'). [/tex]

    Notice too that there is no constant there, so you have to get rid of it first.
  4. Nov 16, 2009 #3
    Thank you very much.
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