Second order nonpersistence of the sine Gordon breather under an exceptional perturbation
Jochen Denzler (1995)
Annales de l'I.H.P. Analyse non linéaire
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Jochen Denzler (1995)
Annales de l'I.H.P. Analyse non linéaire
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Tatsuo Nishitani, Sergio Spagnolo (2001)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Kunihiko Kajitani, Kaoru Yamaguti (1994)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Chin-Cheng Lin (1995)
Revista Matemática Iberoamericana
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We give a Hörmander-type sufficient condition on an operator-valued function M that implies the L-boundedness result for the operator T defined by (Tf)^ = Mf^ on the (2n + 1)-dimensional Heisenberg group H. Here ^ denotes the Fourier transform on H defined in terms of the Fock representations. We also show the H-L boundedness of T, ||Tf|| ≤ C||f||, for H under the same hypotheses of L-boundedness.
N. Ortner, P. Wagner (1995)
Annales de l'I.H.P. Physique théorique
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L. Parson (1982)
Acta Arithmetica
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