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Homework Help: EM Lagrangian

  1. Jan 25, 2008 #1
    We have a suggested Lagrangian

    epsilon(abcd) F^(ab) F^(cd)

    and are asked to comment if this is a sensible EM Lagrangian. The only thing i can think of is that its still gauge invariant in the normal way but otherwise im stumped. would appreciate any suggestions. thanks
  2. jcsd
  3. Jan 25, 2008 #2


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    Did you compute its field equations ?
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