Titlebook: Exact Solutions and Scalar Fields in Gravity; Recent Developments Alfredo Macias,Jorge L. Cervantes-Cota,Claus Lämme Book 2001 Springer Sci

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Effective Four-Dimensional Dilaton Gravity from Five-Dimensional Chern-Simons Gravitypal fiber bundle structure and the toroidal dimensional reduction process in order to study what modifications are obtained to the standard Einstein-Maxwell-dilaton theories. We obtain an effective four dimensional gravity theory endowed with a cosmological term, a scalar dilaton field, an Einstein term, and a non-linear electrodynamics.

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New Solutions of Bianchi Models in Scalar-Tensor Theories including Dehnen’s induced gravity theory. In particular, for the Brans-Dicke theory the equations decouple and one is able to integrate the system for FRW and Bianchi I and V models. Addition-ally, we analyze the possibility that anisotropic models asymptotically isotropize, and/or possess inflationary properties.

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Feed-in tariffs in the European Union, Maclaurin (1742) found the axially symmetric and stationary solution to the problem in the case of constant mass-density: a sequence of oblate spheroids. In the limit of maximum ellipticity a rotating disk is obtained. By applying analytical solution techniques from soliton theory this Maclaurin d

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Stability Frequency and Step Response,fficulties that have been overcome when the space is non-flat in scalar-tensor theories only if the energy-stress tensor is vacuous or describes stiff matter, incoherent radiation or ultrarelativistic matter. This paper reveals the dynamics for these and the other ideal fluid models, in non-flat spa

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