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Homework Help: Proving an identity of Dirac's delta function

  1. Nov 22, 2005 #1
    Hello,

    I need to prove (7) here:
    http://mathworld.wolfram.com/DeltaFunction.html

    http://mathworld.wolfram.com/images/equations/DeltaFunction/equation5.gif [Broken]

    The instructions were to start with the definition of the delta function by integral, and then chagne variables u -> g(x). But I couldn't get anywhere really.

    Thanks,
    Chen
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Nov 22, 2005 #2
    Never mind.
     
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