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## Main Question or Discussion Point

I am 99% sure it is not, but I would like to hear that from someone else to be more serene.

- Thread starter IRobot
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- #1

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I am 99% sure it is not, but I would like to hear that from someone else to be more serene.

- #2

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http://en.wikipedia.org/wiki/Representation_theory_of_the_Lorentz_groupThe Lorentz group has no unitary representation of finite dimension, except for the trivial representation (where every group element is represented by 1).

The vector representation has dimension 4.

- #3

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Thanks I already was thinking with that argument, I did the calculation of [itex] \Lambda \Lambda ^\dagger[/itex] for some random Lorentz Matrix. Was just looking for a confirmation.

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