Results 61 to 70 of about 6,497,246 (364)
A logic road from special relativity to general relativity
, 2011 We present a streamlined axiom system of special relativity in first-order logic. From this axiom system we "derive" an axiom system of general relativity in two natural steps. We will also see how the axioms of special relativity transform into those of
A. Tarski +16 more
core +1 more source
Tachyons in general relativity [PDF]
Journal of Mathematical Physics, 2011 We consider the motion of tachyons (faster-than-light particles) in the framework of general relativity. An important feature is the large contribution of low energy tachyons to the energy-momentum tensor. We also calculate the gravitational field produced by tachyons in particular geometric arrangements; and it appears that there could be self ...
openaire +4 more sources
Anisotropic stars as ultracompact objects in general relativity [PDF]
Physical Review D, 2018 Anisotropic stresses are ubiquitous in nature, but their modeling in General Relativity is poorly understood and frame dependent. We introduce the first study on the dynamical properties of anisotropic self-gravitating fluids in a covariant framework ...
G. Raposo +4 more
semanticscholar +1 more source
Comment on “Construction of regular black holes in general relativity” [PDF]
Physical Review D, 2018 We claim that the physical parameters of the constructed black hole solutions in general relativity (GR) coupled to nonlinear electrodynamics (NED) by Zhong-Ying Fan and Xiaobao Wang in the Paper [Phys. Rev.
B. Toshmatov, Z. Stuchl'ik, B. Ahmedov
semanticscholar +1 more source
occumb: An R package for site occupancy modeling of eDNA metabarcoding data
Population Ecology, EarlyView.This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley +1 more source
Deformed general relativity [PDF]
Physical Review D, 2013 14 ...
Martin Bojowald, George M. Paily
openaire +3 more sources
Maxwellian mirages in general relativity
New Journal of Physics, 2021 Maxwellian approximations to linear general relativity are revisited in light of recent results on the degrees of freedom (DoF) in the linear gravitational field.
L L Williams, N Inan
doaj +1 more source
, 2013 Barbour's formulation of Mach's principle requires a theory of gravity to implement local relativity of clocks, local relativity of rods and spatial covariance. It turns out that relativity of clocks and rods are mutually exclusive.
Koslowski, Tim
core
Emergent gravity, violated relativity and dark matter
, 2014 The nonlinear affine Goldstone model of the emergent gravity, built on the nonlinearly realized/hidden affine symmetry, is concisely revisited. Beyond General Relativity, the explicit violation of general invariance/relativity, under preserving general ...
Pirogov, Yu. F.
core +1 more source
An optimal transport formulation of the Einstein equations of general relativity [PDF]
Journal of the European Mathematical Society (Print), 2018 The goal of the paper is to give an optimal transport formulation of the full Einstein equations of general relativity, linking the (Ricci) curvature of a space-time with the cosmological constant and the energy-momentum tensor. Such an optimal transport
Andrea Mondino, S. Suhr
semanticscholar +1 more source