I would like to have a general formula, and I am quite sure it must exist, for: [itex]\gamma^{\mu}_{ab}\gamma_{\mu \,\alpha\beta}[/itex] but I didn't succeed at deriving it, or intuiting it, I am troubled by the fact that it must mix dotted and undotted indices.(adsbygoogle = window.adsbygoogle || []).push({});

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# Dirac algebra (contraction gamma matrices)

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