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Commutator for fermion operators?

  1. Feb 1, 2014 #1
    If we have two fermion operators with a known anti-commutator AB+BA, what do we do if we find ourselves with AB-BA in an equation? Does this automatically vanish for fermions? if not, is there anything we can say about in general?
  2. jcsd
  3. Feb 1, 2014 #2


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    Not much. If AB+BA=C, then AB-BA=2AB-C. :rolleyes:
  4. Feb 1, 2014 #3
    silly me. I'll have to post the whole question later instead.
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