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Switching partial and ordinary derivatives

  1. Sep 26, 2009 #1
    1. The problem statement, all variables and given/known data

    \frac{d}{dt}\frac{\partial}{\partial \dot{q}} \frac{dF}{dt} = \frac{\partial}{\partial q} \frac{dF}{dt}= \frac{\partial}{\partial t}\frac{\partial}{\partial q} +\frac{\partial}{\partial q}\frac{\partial}{\partial q} \dot{q}

    What's the theorem for switching partial and ordinary derivatives?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Sep 27, 2009 #2
    Re: Derivatives

    Laplace Transform?
    Don't quite get what u mean :P
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