Abstract
The properties are considered of the internal symmetry of first-order relativistic wave equations on the basis of the Gel'fand-Yaglom approach. A sufficient condition is established for the existence of such a symmetry for free fields.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 16–18, July, 1991.
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Pletyukhov, V.A. Internal symmetry of relativistic wave equations. Soviet Physics Journal 34, 575–577 (1991). https://doi.org/10.1007/BF00897982
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DOI: https://doi.org/10.1007/BF00897982