Results 21 to 30 of about 3,971 (207)

Formal statement of the special principle of relativity [PDF]

open access: yes, 2013
While there is a longstanding discussion about the interpretation of the extended, general principle of relativity, there seems to be a consensus that the special principle of relativity is absolutely clear and unproblematic.
Gomori, Marton, Szabo, Laszlo E.
core   +1 more source

An Improved Framework for Quantum Gravity

open access: yesUniverse, 2020
General relativity has two fundamental problems that render it unsuitable for tackling the gravitational field’s quantization. The first problem is the lack of a genuine gravitational variable representing gravitation only, inertial forces apart.
José G. Pereira, Diego F. López
doaj   +1 more source

Testing Gravitational Theories in the Field of the Earth with the SaToR-G Experiment

open access: yesUniverse, 2021
A new satellite-based experiment in the field of gravitation, SaToR-G, is presented. It aims to compare the predictions of different theories of gravitation in the limit of weak-field and slow-motion.
David Lucchesi   +8 more
doaj   +1 more source

On the Status of the Geodesic Principle in Newtonian and Relativistic Physics [PDF]

open access: yes, 2011
A theorem due to Bob Geroch and Pong Soo Jang ["Motion of a Body in General Relativity." Journal of Mathematical Physics 16(1), (1975)] provides a sense in which the geodesic principle has the status of a theorem in General Relativity (GR).
Weatherall, James Owen   +1 more
core   +1 more source

General relativity as a fully singular Lagrange system

open access: yesResults in Physics, 2020
Based on properties of six special gauge-fixing terms of tetrad, some coordinate conditions are presented, which lead to that all second time derivative terms of tetrad in Einstein equation are removed when general relativity is expressed by tetrad ...
Tao Mei
doaj   +1 more source

Gravitational Collapse of Plasmas in General Relativity [PDF]

open access: yesEAS Publications Series, 2008
Talk given at the Spanish Relativity Meeting, Tenerife, September ...
Lasky, Paul, Lun, Anthony
openaire   +2 more sources

A relativistic theory of the field II: Hamilton's principle and Bianchi's identities

open access: yesRevista de Investigación de Física, 2021
As gravitation and electromagnetism are closely analogous long-range interactions, and the current formulation of gravitation is given in terms of geometry.
Mississippi Valenzuela
doaj  

Gravitational waves and their memory in general relativity [PDF]

open access: yesSurveys in Differential Geometry, 2015
General relativity explains gravitational radiation from binary black hole or neutron star mergers, from core-collapse supernovae and even from the inflation period in cosmology. These waves exhibit a unique effect called memory or Christodoulou effect, which in a detector like LIGO or LISA shows as a permanent displacement of test masses and in radio ...
Bieri, Lydia   +2 more
openaire   +2 more sources

Bulk Viscous Bianchi Type VI0 Cosmological Model in the Self-creation Theory of Gravitation and in the General Theory of Relativity [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2019
In the second self-creation theory of gravitation and in the general theory of relativity, Bianchi type VI0 cosmological model in the presence of viscous fluid is studied.
E. A. Hegazy
doaj   +1 more source

Home - About - Disclaimer - Privacy