1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Me in this problem

  1. Dec 6, 2009 #1
    plz help me in this problem

    1. The problem statement, all variables and given/known data

    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. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Dec 13, 2009 #2
    Re: plz help me in this problem

    Add a variable for what you want to show is invariant.
    Show that it makes no difference in the equation.

    For instance, derivative of a function is invariant with respect to a constant added.
    So you make the constant an independent variable. Take a derivative. Notice that the derivative of the independent variable goes to zero...
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook