Abstract
The connection between analytic continuation of group representations and analytic continuation of their matrix elements is discussed, together with some related problems concerning the group-theoretic nature of theS-matrix, and the asymptotic behavior of the special functions of mathematical physics.
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Hermann, R. Analytic continuation of group representations-V. Commun.Math. Phys. 5, 157–190 (1967). https://doi.org/10.1007/BF01646339
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DOI: https://doi.org/10.1007/BF01646339