Results 221 to 230 of about 7,248 (254)

Developments in Lorentzian Geometry

Springer Proceedings in Mathematics and Statistics, 2022
exaly   +2 more sources

Lorentzian Geometry of the Heisenberg Group

Geometriae Dedicata, 2006
N. Rahmani, S. Rahmani
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Progress in Lorentzian Geometry

Springer Proceedings in Mathematics and Statistics
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Lorentzian Geometry and Related Topics

Springer Proceedings in Mathematics and Statistics, 2017
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Trigonometry in Lorentzian Geometry

The American Mathematical Monthly, 1984
(1984). Trigonometry in Lorentzian Geometry. The American Mathematical Monthly: Vol. 91, No. 9, pp. 543-549.
Graciela S. Birman, Katsumi Nomizu
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The origin of Lorentzian geometry

Physics Letters A, 1989
Abstract We investigate how a Lorentzian manifold can be reconstructed from a more fundamental structure, in the context of a proposal for a quantum theory of gravity. We first show that some collections of countable sets of points of the manifold, together with their causal relations, contain all the information of the geometrical structure of the ...
Luca Bombelli, David A. Meyer
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Semigroups in Möbius and Lorentzian Geometry

Geometriae Dedicata, 1998
If \(E\) is a real Hilbert space, then a Möbius semigroup is a subsemigroup of the Möbius group \(M(\widetilde E)\) (the group generated by isometries and inversions in spheres) of \(E\) mapping a fixed Möbius ball (an open ball or an open half space) into itself. The paper under review contains a detailed analysis of the structure of Möbius semigroups.
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Variational methods in Lorentzian geometry

2017
Appliies variational methods and critical point theory on infinite dimenstional manifolds to some problems in Lorentzian geometry which have a variational nature, such as existence and multiplicity results on geodesics and relations between such geodesics and the topology of the manifold.
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Lorentzian comparison geometry

2018
Diese Masterarbeit beschäftigt sich mit einer verallgemeinerten lokalen Version von Toponogov’s Satz für Dreiecksvergleiche auf semi-Riemannsche Mannigfaltigkeiten. Es wird gezeigt, dass Krümmungsschranken die Dreiecksvergleichseigenschaft implizieren, und umgekehrt, wenn die Dreiecksvergleichseigenschaft für alle Punkte in einer Umgebung für ...
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LORENTZIAN BCV SPACES: PROPERTIES AND GEOMETRY OF THEIR SURFACES

Journal of the Australian Mathematical Society
Abstract We investigate the Lorentzian analogues of Riemannian Bianchi–Cartan–Vranceanu spaces. We provide their general description and emphasize their role in the classification of three-dimensional homogeneous Lorentzian manifolds with a four-dimensional isometry group. We then illustrate their geometric properties (with particular
Calvaruso G., Pellegrino L.
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