We consider the conservative and non-conservative cases of two classes of models to perform the analysis. The results of the viability of the classes are discussed and it is found that the value of the Hubble constant has no effect on the viability of the models. Focusing on some general ...
When used with alternative formulations it guarantees equivalence and conservative fields over a wide range of field choices from traditional metric space-time to background-embedded to emergent space-time. A short worked-out gravity-related inertia field example is given. New perspectives on spin ...
Modified gravity theories have the potential of explaining the recent acceleration of the Universe without resorting to the mysterious concept of dark ener
Apart from the familiar structure firmly-rooted in the general relativistic field equations where the energy--momentum tensor has a null divergence i.e., it conserves, there exists a considerable number of extended theories of gravity allowing departures from the usual conservative framework. Many of...
We consider a broad family of higher-derivative extensions of four-dimensional Einstein gravity and study the multipole moments of rotating black holes the
We analyze the vacuum static spherically symmetric spacetime for a specific class of nonconservative theories of gravity based on Rastall's theory. We obtain a new vacuum solution which has the same structure as the Schwarzschild-de Sitter solution in the general relativity theory obtained with a ...
While being as old as general relativity itself, the gravitational two-body problem has never been under so intense investigation as it is today, spurred by both phenomenological and theoretical motivations. The observations of gravitational waves emitte
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Seismic analysis of gravity dams: a comparative study using a progressive methodology In structural analysis, it is widely accepted that simplified methods, that require fewer resources, should produce more conservative results, while more s... EM Bretas,AL Batista,JV Lemos - International Conference...
While the first feature is perhaps in conflict with the conventional interpretation of pure 3d gravity as dual to a single quantum system,2 the last two features signal non-unitarity are more problematic. In this paper we will describe a simple modification of [14] which 1The analysis in [8...