Abstract
The structure of the quadratic algebras of spinor symmetry operators for the Dirac equation is studied in a four-dimensional flat space and in the de Sitter space of arbitrary signature. The algebras are shown to be standard equivalent. Linear noncommutative subalgebras meeting the conditions of the noncommutative integrability theorem are found in these algebras.
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Klishevich, V.V., Tyumentsev, V.A. On the Algebra of Symmetry of the Dirac Equation in Flat Space and De Sitter Space. Russian Physics Journal 44, 843–851 (2001). https://doi.org/10.1023/A:1013603802498
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DOI: https://doi.org/10.1023/A:1013603802498