Results 61 to 70 of about 6,607,101 (361)
Symmetries and charges of general relativity at null boundaries [PDF]
Journal of High Energy Physics, 2018 We study general relativity at a null boundary using the covariant phase space formalism. We define a covariant phase space and compute the algebra of symmetries at the null boundary by considering the boundary-preserving diffeomorphisms that preserve ...
V. Chandrasekaran +2 more
semanticscholar +1 more source
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
Nonmetricity formulation of general relativity and its scalar-tensor extension [PDF]
Physical Review D, 2018 Einstein's celebrated theory of gravitation can be presented in three forms: general relativity, teleparallel gravity, and the rarely considered before symmetric teleparallel gravity.
Laur Jarv +3 more
semanticscholar +1 more source
General Relativity today [PDF]
, 2007 49 pages, 5 figures, talk given at the Poincar\'e Seminar ``Gravitation et Exp\'erience'' (28 October 2006, Paris); to appear in the proceedings to be published by Birkh ...
openaire +2 more sources
Black Holes in an Effective Field Theory Extension of General Relativity. [PDF]
Physical Review Letters, 2018 Effective field theory methods suggest that some rather general extensions of general relativity include, or are mimicked by, certain higher-order curvature corrections, with coupling constants expected to be small but otherwise arbitrary.
V. Cardoso +3 more
semanticscholar +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background/Objectives Osteosarcoma is a radioresistant tumor that may benefit from stereotactic body radiation therapy (SBRT) for locoregional control in metastatic/recurrent disease. We report institutional practice patterns, outcomes, toxicity, and failures in osteosarcoma patients treated with SBRT.
Jenna Kocsis +13 more
wiley +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
Charged multifluids in general relativity
, 2003 The exact 1+3 covariant dynamical fluid equations for a multi-component plasma, together with Maxwell's equations are presented in such a way as to make them suitable for a gauge-invariant analysis of linear density and velocity perturbations of the ...
Bardeen J M +30 more
core +2 more sources
Parent‐to‐Child Information Disclosure in Pediatric Oncology
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Despite professional consensus regarding the importance of open communication with pediatric cancer patients about their disease, actual practice patterns of disclosure are understudied. Extant literature suggests a significant proportion of children are not told about their diagnosis/prognosis, which is purported to negatively ...
Rachel A. Kentor +12 more
wiley +1 more source
An Isotropic Cosmological Model with Aetherically Active Axionic Dark Matter
UniverseWithin the framework of the extended Einstein–aether–axion theory, we studied the model of a two-level aetheric control over the evolution of a spatially isotropic homogeneous Universe filled with axionic dark matter. Two guiding functions are introduced,
Alexander Balakin, Amir Shakirzyanov
doaj +1 more source