Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Anyone can help me

  1. Dec 6, 2009 #1
    plz anyone can help me

    how make check the linearity and shift invarient for the system

    I want to determine whether the system is linear and shift invarientby steps

    g(m,n) = f(m,-1) + f(m,0) + f(m,1)

    g(x) = (integration from +infinety to - infinety) f(x,z) dz

    plz help me
    Thanks alot
  2. jcsd
  3. Dec 6, 2009 #2


    User Avatar
    Science Advisor

    Re: plz anyone can help me

    Your questions are very unclear!!
    In first equation, what is n?
    What is the "system"?
    You use g for functions in both equations, one with two arguments (integers?) and the other with one (real?). Is there any connection between them?
  4. Dec 8, 2009 #3
    Re: plz anyone can help me

    first m,n is variables but the variable n not appear as a term at the other side from the first equation
    Second this equation not describe a special system

    plz any one help me
  5. Dec 9, 2009 #4
    Re: plz anyone can help me

    anybody here??????????????????
  6. Dec 9, 2009 #5


    User Avatar
    Science Advisor

    Re: plz anyone can help me

    Are these then two different questions? In both of them whether g is linear and/or "shift invarient" depends upon whether f is or is not. Since you haven't told us what f is, we can't answer. If the question was whether g is linear no matter what f is, the answer is "no".
  7. Dec 11, 2009 #6
    Re: plz anyone can help me

    we need check the system overall g and f, both is unknown
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook