Sobre ondas gravitacionais planas não-lineares
Revista Brasileira de Ensino de Física, 2021 As ondas gravitacionais não-lineares são soluções exatas das equações de Einstein que descrevem um campo radiativo propagando com a velocidade da luz. A não-linearidade das equações de Einstein torna difícil o rastreamento de soluções analíticas, sendo ...
F.L. Carneiro, S.C. Ulhoa
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Palatini approach to Born-Infeld-Einstein theory and a geometric description of electrodynamics [PDF]
, 2003 The field equations associated with the Born-Infeld-Einstein action are derived using the Palatini variational technique. In this approach the metric and connection are varied independently and the Ricci tensor is generally not symmetric.
D.E. Davis, Jr. +10 more
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Dynamical evolution of a vector field perturbation coupled to the Einstein tensor [PDF]
, 2014 We have investigated the wave dynamics of a vector field perturbation coupling to the Einstein tensor in the four-dimensional Reissner-Nordstrom black hole spacetime.
Songbai Chen, Jiliang Jing
semanticscholar +1 more source
A new curvature-like tensor in an almost contact Riemannian manifold
Pracì Mìžnarodnogo Geometričnogo Centru, 2016 In a M. Prvanović’s paper [5], we can find a new curvature-like tensor in an almost Hermitian manifold.In this paper, we define a new curvature-like tensor, named contact holomorphic Riemannian, briefly (CHR), curvature tensor in an almost ...
Koji Matsumoto
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Einstein gravity from Conformal Gravity in 6D
Journal of High Energy Physics, 2021 We extend Maldacena’s argument, namely, obtaining Einstein gravity from Conformal Gravity, to six dimensional manifolds. The proof relies on a particular combination of conformal (and topological) invariants, which makes manifest the fact that 6D ...
Giorgos Anastasiou +2 more
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Solution generating in scalar-tensor theories with a massless scalar field and stiff perfect fluid as a source [PDF]
, 2001 We present a method for generating solutions in some scalar-tensor theories with a minimally coupled massless scalar field or irrotational stiff perfect fluid as a source. The method is based on the group of symmetries of the dilaton-matter sector in the
A. Billyard +47 more
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Generalized Quasi-Einstein Manifolds in Contact Geometry
Mathematics, 2020 In this study, we investigate generalized quasi-Einstein normal metric contact pair manifolds. Initially, we deal with the elementary properties and existence of generalized quasi-Einstein normal metric contact pair manifolds.
İnan Ünal
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LA GRAVITACION COMO UN MODELO DE CUERDA Y SU CUANTIZACION EN EL ESPACIO DE MINKOWSKI
Revista de Investigación de Física, 2006 Se considera las ecuaciones de campo gravitacional de Einstein, identificándolas con las funciones que describen la inmersión del espacio-tiempo en un espacio plano encontrando así un modelo de teoría de campo.
Fulgencio Villegas Silva
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Braneworlds with field derivative coupling to the Einstein tensor [PDF]
, 2013 In this paper, we investigate the Randall-Sundrum type braneworld models in the scalar-tensor theory with field derivative coupling to the Einstein tensor.
Masato Minamitsuji
semanticscholar +1 more source
Generalized inverses of Boolean tensors via the Einstein product [PDF]
Linear and Multilinear Algebra, 2020 29 ...
Ratikanta Behera, Jajati Keshari Sahoo
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