A scattering theory for automorphic functions
Séminaire Goulaouic-Schwartz (1973-1974), Exposé no. 23, 7 p. 
@article{SEDP_1973-1974____A21_0,
     author = {Lax, P. D. and Phillips, R. S.},
     title = {A scattering theory for automorphic functions},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:23},
     pages = {1--7},
     year = {1973-1974},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     mrnumber = {407626},
     zbl = {0297.35061},
     language = {en},
     url = {https://www.numdam.org/item/SEDP_1973-1974____A21_0/}
}
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Lax, P. D.; Phillips, R. S. A scattering theory for automorphic functions. Séminaire Goulaouic-Schwartz (1973-1974), Exposé no. 23, 7 p.. https://www.numdam.org/item/SEDP_1973-1974____A21_0/

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[2] L.D. Faddeev and B.S. Pavlov: Scattering theory and automorphic functions, Seminar of Steklov math. Inst. of Leningrad, vol.27 (1972) 161-193. | Zbl | MR

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