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Homework Help: Variational principle?

  1. Jun 7, 2006 #1
    I need someone who can briefly (in easy way) explain me the variational principle or tell me where (in checked source) I can find this. I will be very greatful.
    Last edited: Jun 7, 2006
  2. jcsd
  3. Jun 8, 2006 #2


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    Homework Helper

    There are several variational principles ...
    a) wave propagation (least time, a special case of Huygens wave fronts;
    ... generalized to Feynman path)
    b) classsical mechanics , usually Hamilton's extreme action integral.
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