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Quick notation question (QFT)

  1. Nov 21, 2006 #1
    [tex]\delta^{\left(d\right)}\left(\b{q}-\b{q}\prime \right)[/tex]

    from Quantum Field theory and Critical Phenomena by Justin.. (the text covers QFT from a statistical view)

    Question: what does the d in brackets mean/do ?

    Thanks =)
  2. jcsd
  3. Nov 21, 2006 #2
    this is mainly a quess but I think it could be the dimension of the delta function ie if d=3 the the q-vectors are 3 component vectors. I think I've seen such notation used somewhere.
  4. Nov 22, 2006 #3


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    I've seen it in BRST, so i also think it may mean the dimension of space(time).

  5. Nov 22, 2006 #4
    lol can't be bothered with latex at the mo, but yeah I asked someone in my office and they said it meant that function multiplied together d times but in terms of the dimensional components
    Last edited: Nov 22, 2006
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