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Homework Help: Dirac's equation notation definition?

  1. Nov 14, 2012 #1
    1. The problem statement, all variables and given/known data

    I've been asked to write what this is explicitly - γμμ

    2. Relevant equations

    μμ-im)ψ = 0 - Dirac's equation

    3. The attempt at a solution
    I understand that γμ is a matrix but depending on what μ is they're all completely different :S

    How can it be written explicitly if it completely changes based on μ?

    Thanks in advance guys,

    K Xoxo
  2. jcsd
  3. Nov 14, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper

    It's just a sum of 4 terms, I think you're supposed to write them all with the + sign 3 times between them. And probably even more, namely use a specific representation of the gamma matrices.
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