no. 2
Analyticity and smoothing effect for the Schrödinger equation
Annales de l'I.H.P. Physique théorique, Tome 52 (1990) no. 2, pp. 163-173. 
@article{AIHPA_1990__52_2_163_0,
     author = {Hayashi, Nakao and Saitoh, Saburou},
     title = {Analyticity and smoothing effect for the {Schr\"odinger} equation},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {163--173},
     publisher = {Gauthier-Villars},
     volume = {52},
     number = {2},
     year = {1990},
     zbl = {0731.35047},
     mrnumber = {1051235},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__52_2_163_0/}
}
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Hayashi, Nakao; Saitoh, Saburou. Analyticity and smoothing effect for the Schrödinger equation. Annales de l'I.H.P. Physique théorique, Tome 52 (1990) no. 2, pp. 163-173. http://www.numdam.org/item/AIHPA_1990__52_2_163_0/

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