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Homework Help: Wave equation, separation of variables and the Laplace transform

  1. Nov 29, 2017 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations
    If i solve the wave equation using separation of variable and laplace tranform. Will i get the same answer ?

    3. The attempt at a solution
     
  2. jcsd
  3. Nov 29, 2017 #2

    Ray Vickson

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    Take an example. Try both methods. What do you get?
     
  4. Nov 29, 2017 #3
    sometimes they are equal but sometimes they are not
     
  5. Nov 29, 2017 #4

    Ray Vickson

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    OK, so there's your answer.

    But that just gets you started: why can they ever be unequal? What kind of problem gives you that? And: are you sure you have not made an error?

    Maybe more details would be helpful.
     
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