Please use this identifier to cite or link to this item: http://hdl.handle.net/10525/2585

 Title: Global Waves with Non-Positive Energy in General Relativity Authors: Bachelot, Alain Keywords: Global Cauchy ProblemCausalitySuperradianceTime MachineBlack-holeScattering Issue Date: 2008 Publisher: Institute of Mathematics and Informatics Bulgarian Academy of Sciences Citation: Serdica Mathematical Journal, Vol. 34, No 1, (2008), 127p-154p Abstract: The theory of the waves equations has a long history since M. Riesz and J. Hadamard. It is impossible to cite all the important results in the area, but we mention the authors related with our work: J. Leray [34] and Y. Choquet-Bruhat [9] (Cauchy problem), P. Lax and R. Phillips [33] (scattering theory for a compactly supported perturbation), L. H¨ ormander [27] and J-M. Bony [7] (microlocal analysis). In all these domains, V. Petkov has made fundamental contributions, mainly in microlocal analysis, scattering theory, dynamical zeta functions (see in particular the monography [42]). In this paper we present a survey of some recent results on the global existence and the asymptotic behaviour of waves, when the conserved energy is not definite positive. This unusual situation arises in important cosmological models of the General Relativity where the gravitational curvature is very strong. We consider the case of the closed time-like curves (violation of the causality) [1], and the charged black-holes (superradiance) [3] Description: 2000 Mathematics Subject Classification: 35Lxx, 35Pxx, 81Uxx, 83Cxx. URI: http://hdl.handle.net/10525/2585 ISSN: 1310-6600 Appears in Collections: Volume 34, Number 1

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