1. Not finding help here? Sign up for a free 30min 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!

[help] how to prove this equation

  1. Aug 14, 2006 #1

    Hello all, how to prove the above equation
    thanks a lot
  2. jcsd
  3. Aug 15, 2006 #2


    User Avatar
    Homework Helper

    Could you explain what [tex]s, \sigma , \ j, \ \omega[/tex] are? Are they constants, negative or positive?
  4. Aug 15, 2006 #3
    hi ViettDao29
    s is a complex
  5. Aug 15, 2006 #4
    Oh... so j is our usual i=sqrt(-1) :tongue:
    Use an inequality for integral that absolute value of integral is less than or equal to integral of absolute value. Then consider that

    |e^{-s}| = |e^{- \sigma}| |e^{-j \omega}|


    Now, what is [itex]|e^{-j \omega}| [/itex] ?
    Last edited: Aug 15, 2006
  6. Aug 15, 2006 #5


    User Avatar
    Homework Helper

    Also recall that [tex]\, \left| \int f(x) \, dx\right| \leq \int\left| f(x) \right| \, dx[/tex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: [help] how to prove this equation
  1. How to prove (Replies: 2)

  2. Proving equations (Replies: 4)