Metric characterizations of hyperbolic and Euclidean spaces
J. E. Valentine, S. G. Wayment (1972)
Colloquium Mathematicae
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J. E. Valentine, S. G. Wayment (1972)
Colloquium Mathematicae
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Ion Suciu, Ilie Valuşescu (1976)
Studia Mathematica
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Yamashita, Shinji (1994)
Annales Academiae Scientiarum Fennicae. Series A I. Mathematica
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Mineyev, Igor (2005)
Geometry & Topology
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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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J. Kisyński (1970)
Colloquium Mathematicae
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Sudhanshu K. Ghoshal, Abha Ghoshal, M. Abu-Masood (1977)
Annales Polonici Mathematici
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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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Carvalho e Silva, Jaime (1988)
Portugaliae mathematica
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Shinji Yamashita (1983)
Mathematica Scandinavica
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Demirel, Oğuzhan, Soytürk, Emine (2008)
Novi Sad Journal of Mathematics
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Kunihiko Kajitani, Yasuo Yuzawa (2006)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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We discuss the local existence and uniqueness of solutions of certain nonstrictly hyperbolic systems, with Hölder continuous coefficients with respect to time variable. We reduce the nonstrictly hyperbolic systems to the parabolic ones and by use of the and the Banach scale method we construct a semi-group which gives a representation of the solution to the Cauchy problem.