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When can one Change order of derivatives?

  1. Jan 16, 2012 #1
    Here is an example...

    d/dz(dp/dx) = d/dx(dp/dz)

    I dont remember learning this in my calculus or differential equations classes unless it was called something else.
  2. jcsd
  3. Jan 16, 2012 #2

    Simon Bridge

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    Those would be mixed partial derivatives.
    Look it up.

    The short answer is: almost always.
    Last edited: Jan 16, 2012
  4. Jan 16, 2012 #3
    Hmm...ok never knew that. Thanks.
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