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Does anybody know how to exploit the product of structure constants of SU(N) through Kroenecker deltas? I mean

[tex]\sum_a f_{abc}f_{ade}[/tex]

I know this for SU(2) as in this case I have the Levi-Civita symbol but in other cases I was not able to recover it in literature. Any help appreciated.

Jon

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# Structure constants of SU(N)

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