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Homework Help: EM Field Theory (Action Symmetries)

  1. Jun 21, 2014 #1
    1. The problem statement, all variables and given/known data
    I uploaded a picture with the question


    2. Relevant equations
    my problem is :

    How should I find all the symmetries of the action ?
    Is there an easy way to recognize those symmetries or should I try all the symmetries I know and see if the action doesn't change?

    Even some tricks to identify symmetries like : lorentz , translation, rotation will halp me :)

    Thank You!


    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
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