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Homework Help: First order perturbation

  1. Jul 22, 2013 #1
    1. The problem statement, all variables and given/known data
    I required to make a perturbation expansion in ε of the function:
    2. Relevant equations


    3. The attempt at a solution
    I get the terms A0(X,z) and ∂/∂XA0(X,z)sin(w,y) with the derivative with respect to ε . But I could not get A1.
    Last edited: Jul 22, 2013
  2. jcsd
  3. Jul 28, 2013 #2


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    Gold Member

    Can you elaborate on this?

    Do you want to find a Taylor series for this function?

    In that case you've got the formula for Taylor series in more than one variables.
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