The classification of four-dimensional nonconjugate subalgebras of the Lie algebra of the Poincare group P(1, 4) into classes of isomorphic subalgebras is performed. Using this classification, we construct invariant operators (generalized Casimir operators) [30] for all four-dimensional nonconjugate subalgebras of the Lie algebra of the group P(1, 4) and present them in the explicit form.
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Translated from Matematychni Metody ta Fizyko-Mekhanichni Polya, Vol. 53, No. 4, pp. 17–27, October–December, 2010.
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Fedorchuk, V.M., Fedorchuk, V.I. Invariant operators of four-dimensional nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4). J Math Sci 181, 305–319 (2012). https://doi.org/10.1007/s10958-012-0686-6
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DOI: https://doi.org/10.1007/s10958-012-0686-6