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Higher order difference expressions

  1. Apr 1, 2009 #1
    Hello. I need finite difference expression of sixth order derivative in h^2. I derived it using Mathematica 6 but when I use the expression there appear a problem. Solution is wrong. I check everythin and realized that only i m not sure about that expression. I ll be appreciated if you help. Thanks in advance.
  2. jcsd
  3. Apr 1, 2009 #2


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    I don't know what you mean by " sixth order derivative in h^2".
  4. Apr 1, 2009 #3
    Hi. Let me explain.

    I have a differential equation and try to solve it using finite difference method. Differential equation has sixth order derivative of dependent variable. So; i need difference expression for that derivative. "h" is the step size and saying " sixth order derivative in h^2" i mean the order of the error is square of step size.( O(h2) )
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