It is often stated that the Kronecker delta and the Levi-Civita epsilon are the only (irreducible) invariant tensors under the Lorentz transformation. While it is fairly easy to prove that the two tensors are indeed invariant wrt Lorentz transformation, I have not seen a proof that there aren't any more such tensors.(adsbygoogle = window.adsbygoogle || []).push({});

So, my question is, how to findallinvariant tensors under some (linear) transformation? Is there a general procedure for this?

Thanks

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# Invariant tensors

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