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Convolution integral question

  1. Jul 10, 2010 #1
    5fqj5l.jpg
    cant understand the red arrow transition
    i changes the intervals and i cuts half of the arguent inside the integral
    i cant see why
    ?

    regarding the interval change
    the H function is 1 in a certain interval
    so if they change the integrval then its no longer H inside
    because we have taken the '1' part of the H
    ??

    regarding the cutting in half the argument inside the integral
    i have no idea
     
  2. jcsd
  3. Jul 10, 2010 #2
    On the interval 0 <= t <= 1, we have H(t+1) - H(t-1) = 1. Outside that interval, H(t+1) - H(t-1) = 0. The steps the author skips here are just simplifying steps. Can you get the rest from here? I hope this helps.
     
  4. Jul 10, 2010 #3
    thanks
    :)
     
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