Weakly hyperbolic equations with time degeneracy in Sobolev spaces.
Reissig, Michael (1997)
Abstract and Applied Analysis
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Reissig, Michael (1997)
Abstract and Applied Analysis
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Tamotu Kinoshita, Karen Yagdjian (2003)
Banach Center Publications
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Daniela Calvo (2006)
Bollettino dell'Unione Matematica Italiana
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We prove the well-posedness of the Cauchy Problem for first order weakly hyperbolic systems in the multi-anisotropic Gevrey classes, that generalize the standard Gevrey spaces. The result is obtained under the following hypotheses: the principal part is weakly hyperbolic with constant coefficients, the lower order terms satisfy some Levi-type conditions; and lastly the coefficients of the lower order terms belong to a suitable anisotropic Gevrey class. In the proof it is used the quasi-symmetrization...
Sudhanshu K. Ghoshal, Abha Ghoshal, M. Abu-Masood (1977)
Annales Polonici Mathematici
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Avalishvili, G., Gordeziani, D. (1999)
Bulletin of TICMI
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Michał Kisielewicz (1975)
Annales Polonici Mathematici
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Kharibegashvili, Sergo (1997)
Memoirs on Differential Equations and Mathematical Physics
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J. Kisyński (1970)
Colloquium Mathematicae
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Jan Dymara, Damian Osajda (2007)
Fundamenta Mathematicae
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We prove that the boundary of a right-angled hyperbolic building is a universal Menger space. As a consequence, the 3-dimensional universal Menger space is the boundary of some Gromov-hyperbolic group.
R. Krasnodębski (1970)
Colloquium Mathematicae
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Daniel Tataru (1999-2000)
Séminaire Équations aux dérivées partielles
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N. Iwasaki (1985-1986)
Séminaire Équations aux dérivées partielles (Polytechnique)
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Faraut, Jacques (1996)
Journal of Lie Theory
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Romanov, V. G. (2003)
Sibirskij Matematicheskij Zhurnal
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H. Komatsu (1980-1981)
Séminaire Équations aux dérivées partielles (Polytechnique)
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