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I'm not sure about trace identity 5, it seems that plugging in 0123 for \mu\nu\rho\sigma gives a sign mismatch. My field theory book has the identity with the sign as in the article, though, so I'm hesitant to change it.JochemKaas01:33, 16 December 2006 (UTC)[reply]
I fixed a sign on the chiral definition, as the text said that stays the same, as does my book...