i find here a representation of the Lorentz algebra.(adsbygoogle = window.adsbygoogle || []).push({});

Starting from the matrix representation (with the ##\lambda## parameter) i see

how one gets the matrix form of ##iJ_z##

I am less comfortable with the ## -i y\partial_x + x \partial_y## notation

Where does it come from? They say that it is a killing vector on ##R^4##

I suppose that this is basic but as i read it in a physics paper i have not the complete background.

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# Representation of Lorentz algebra

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