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Explain the differential of lagrangian is a perfect ?L dt

  1. Oct 15, 2009 #1
    how we can explain the differential of lagrangian is a perfect ?L dt
     
  2. jcsd
  3. Oct 15, 2009 #2
    Re: lagrangian

    It's dS = Ldt, the action differential. It's just definitions.
     
  4. Oct 15, 2009 #3
    Re: lagrangian

    yes, but how we can prove is it a perfect differential!
     
  5. Oct 15, 2009 #4
    Re: lagrangian

    By definition - it is.
     
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