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Differential expression: Does it make sense?

  1. Jan 25, 2013 #1

    rollingstein

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    Gold Member

    I saw someone write this:

    dW=Pd2V

    I think this doesn't make any sense mathematically; but I wanted to check. Is this mathematically meaningful at all?

    This I understand:

    dW=PdV

    W=∫PdV

    But for dW=Pd2V I cannot see how one could proceed.

    Here V is an independent variable; P=f(V).
     
  2. jcsd
  3. Jan 25, 2013 #2

    HallsofIvy

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    No, that doesn't make sense. You cannot have a "first differential" equal to a "second differentrial.
     
  4. Jan 25, 2013 #3

    rollingstein

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    Gold Member

    Thanks.
     
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