Results 51 to 60 of about 3,971 (207)
A Brief Remark on Energy Conditions and the Geroch-Jang Theorem [PDF]
, 2011 The status of the geodesic principle in General Relativity has been a topic of some interest in the recent literature on the foundations of spacetime theories.
Weatherall, James Owen +1 more
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Gravitational radiation of a spherically symmetric source in f(R)-gravitation
European Physical Journal C: Particles and FieldsIt is shown that Birkhoff’s theorem for the general theory of relativity is overcome in the f(R)-theory of gravitation. That means, the f(R)-theory of gravitation, unlike Einstein’s general theory of relativity, does not forbid gravitational radiation ...
Pham Van Ky +2 more
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The Effects of Minimal Length in Entropic Force Approach
Advances in High Energy Physics, 2013 With Verlinde’s recent proposal which says that gravity can be identified with an entropic force and considering the effects of generalized uncertainty principle in the black hole entropy-area relation we derive the modified equations for Newton’s law of
Barun Majumder
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Қарағанды университетінің хабаршысы. Физика сериясы, 2019 The most important conclusion from this article is that from the General Theory of Relativity do not result any gravitational waves, but just ordinary modulation of the gravitational field intensities caused by rotating of bodies.
Р. Шостэк +2 more
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Coordinates, observables and symmetry in relativity [PDF]
, 2007 We investigate the interplay and connections between symmetry properties of equations, the interpretation of coordinates, the construction of observables, and the existence of physical relativity principles in spacetime theories. Using the refined notion
Westman, Hans +3 more
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Quintessence and phantom emerging from the split-complex field and the split-quaternion field
, 2016 Motivated by the mathematic theory of split-complex numbers (or hyperbolic numbers, also perplex numbers) and the split-quaternion numbers (or coquaternion numbers), we define the notion of split-complex scalar field and the split-quaternion scalar field.
Shen, You-Gen +2 more
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Flavour-Oscillation Clocks and the Geometricity of General Relativity [PDF]
, 2008 A revised version of this preprint is available: http://philsci-archive.pitt.edu/archive ...
E. Knox, Knox, Eleanor
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Generalising the coupling between spacetime and matter
Physics Letters B, 2017 We explore the idea that the coupling between matter and spacetime is more complex than the one originally envisioned by Einstein. We propose that such coupling takes the form of a new fundamental tensor in the Einstein field equations. We then show that
Sante Carloni
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The origin of the spacetime metric: Bell's `Lorentzian pedagogy' and its significance in general relativity [PDF]
, 1999 The purpose of this paper is to evaluate the `Lorentzian Pedagogy' defended by J.S. Bell in his essay ``How to teach special relativity'', and to explore its consistency with Einstein's thinking from 1905 to 1952.
Pooley, Oliver, Brown, Harvey R.
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The Geometry of Conventionality [PDF]
, 2013 Hans Reichenbach famously argued that the geometry of spacetime is conventional in relativity theory, in the sense that one can freely choose the spacetime metric so long as one is willing to postulate a "universal force field".
Weatherall, James Owen +3 more
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