Lévy processes on the Lorentz-Lie algebra

Lévy processes in the sense of Schürmann on the Lie algebra of the Lorentz grouop are studied. It is known that only one of the irreducible unitary representations of the Lorentz group admits a non-trivial one-cocycle. A Schürmann triple is constructed for this cocycle and the properties of the associated Lévy process are investigated. The decommpositions of the restrictions of this triple to the Lie subalgebras $so(3)$ and $so(2,1)$ are described.

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