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On the influence of global cosmological expansion on the dynamics and kinematics of local systems - Carrera, Matteo et al. Pseudotensors and quasilocal gravitational energy momentum - Chang, Chia-Chen et al. Chang, C. Energy-momentum quasi-localization for gravitating systems - Energy momentum quasi localization for gravitating systems - Chang, Chia-Chen et al. Chellathurai, V. Effective mass of a rotating black hole in a magnetic field - Quasi-local energy for cosmological models - Chen, Chiang-Mei et al.

A22 arXiv A arXiv Chen, C. Quasilocal energy momentum for gravity theories - Chen, Chiang-Mei et al. Spinor formulations for gravitational energy momentum - Chen, Chiang-Mei et al. The Hamiltonian boundary term and quasi-local energy flux - Chen, Chiang-Mei et al. Evaluating quasilocal energy and solving optimal embedding equation at null infinity - Chen, Po-Ning et al.

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Scalar curvature deformation and a gluing construction for the Einstein constraint equations - On the asymptotics for the vacuum Einstein constraint equations - Corvino, Justin et al. On the center of mass of isolated systems - Corvino, Justin et al. Quasilocal thermodynamics of dilaton gravity coupled to gauge fields - Creighton, Jolien D. Crnkovic, C. Covariant description of canonical formalism in geometrical theories - in Hawking, S. Three Hundred Years of Gravitation, pp. Living Reviews in Relativity Szabados.

## Relativity Gravitation World Structure - AbeBooks

D22 Angular momentum-mass inequality for axisymmetric black holes - Dain, Sergio Phys. Proof of the local angular momemtum-mass inequality for axisymmetric black holes - Dain, Sergio Class. A Variational principle for stationary, axisymmetric solutions of Einstein's equations - Dain, Sergio Class. The inequality between mass and angular momentum for axially symmetric black holes - Dain, Sergio Int. D17 arXiv Proof of the angular momentum-mass inequality for axisymmetric black holes - Dain, Sergio J.

Counterexample to a Penrose inequality conjectured by Gibbons - Dain, Sergio et al. Geometric inequalities for axially symmetric black holes - Dain, Sergio Class. New conformally flat initial data for spinning black holes - Dain, Sergio et al. General existence proof for rest frame systems in asymptotically flat space-time - Dain, Sergio et al.

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On the spectrum of the Dirac operator under boundary conditions - Noether charges, Brown-York quasilocal energy and related topics - Fatibene, L. Energy localization invariance of tidal work in general relativity - Favata, Marc Phys. Ferraris, M. Covariant first-order Lagrangians, energy-density and superpotentials in general relativity - Conservation laws in general relativity - Hoop conjecture for black-hole horizon formation - Proof of classical versions of the Bousso entropy bound and of the generalized second law - Flanagan, Eanna E.

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- Cascading style sheets 2.0 : programmers reference.
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- Analysis of the Sravakabhumi Manuscript.

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## MONOGRAPHS AND TEXTBOOKS

Help Centre. My Wishlist Sign In Join. Relativity Physics. Giampiero Esposito. Stellar Populations Proceedings of the th Symposium of the Inter Belinski E. Basic Relativity. Klaus Mainzer J. Carlo Cercignani Gilberto M. Special Relativity From Einstein to Strings.

## Kinematic Relativity by Milne E a

Patricia M. Schwarz John H. Symmetries in Physics Philosophical Reflections.

The Early Universe Facts and Fiction. Piotr T. Chrusciel Jacek Jezierski Jerzy Kijowski. Yasunori Fujii Kei-ichi Maeda. Swiss Societ Although relativistic stars, and in particular collapse models, had been thought about earlier, the relevance of models with strong gravitational fields became much greater. We now deal with the formation and structure of neutron stars and black holes, and binaries thereof, as well as of -ray burst sources GRB. Neutron stars arise as the residues of supernovae.

Pulsars are rotating neutron stars. The results support the reality of gravitational waves, since the predicted radiation output exactly accounts for the observed period decreases. X-ray emitting binaries are now generally thought to consist of a black hole and a companion star from which matter is stripped by tidal forces.

The X-rays come from the accretion disk. Long GRBs, found in galaxies where massive stars are forming, are thought to be due to core collapse of stars: some are associated with unusually bright supernovae, and they are seen out to redshifts of 8 or 9. There are jet outflows, as with active galactic nuclei. Some other GRB may be due to a galactic centre black hole swallowing a star.

- Potential Scattering in Atomic Physics.
- Neuroscience - Dealing With Frontiers.
- Kinematic Relativity by Milne E a.

The tests of GR other than the binary pulsar measurement are tests within the Solar system, often using spacecraft, and some are purely terrestrial. Light-bending by the Sun is now measured using radio sources and very-long-baseline interferometry. The gravitational redshift effect has been measured very accurately to the height of a tower using the Mossbauer effect, and also using clocks on board rockets. The orbital effects are tested by the fact that GR calculation of spacecraft trajectories works.

In addition to these modern versions of the so-called classical tests, observations are made of time delays on signals within the Solar system, of diurnal variation in superconducting gravimeter readings, and of the rotation of the Earth. That gravity acts on itself is shown by the very accurate position measurements of the Moon, using laser ranging to a reflector placed by astronauts.

Two perpendicular rotations of axis of an orbiting gyroscope predicted by GR were tested by Gravity Probe B. That showed agreement to 0. The GPS system uses 24 satellites plus spares in 6 orbital planes. They contain clocks stable to about 4 ns over 1 day. At the speed of light, a 1 ns error is about 30 cm. If light speed varied it would upset GPS measurements by this much or more: so the first aspect GPS depends on is the constancy of as incorporated in SR. For extra details of GPS see [6]. The gravitational redshift from the satellites to the ground is about times the clock errors.

So the gravitational redshift effect could be in Km. The time dilation due to the motion of the satellites known in a rotating frame as the Sagnac effect is calculated to contribute a correction of In tests it accumulated up to ns. So failing to allow for this special relativistic effect would lead to errors of around 60m, enough to cause problems for car satnavs. The remaining effects are smaller. The leading one arises from the fact that the satellites are in elliptic rather than purely circular orbits.

For an orbit of eccentricity GR predicts a contribution of about 23 ns i. Detailed measurements on one of the satellites SV 13 , which has , showed deviations up to 10m. The prediction of this effect was tested in , in order to show that a GPS management decision not to include this automatically in the next generation of satellites was misguided. The tests included calculation and observation of satellite positions to within 1 mm. I regard this as one of the most unexpected and remarkable consequences of GR.

The mathematics has also developed, and has influenced other areas of mathematics and physics. We now have a deep understanding of the possible global techniques. Connection and curvature have become fundamental in modern gauge theories. Connections with other areas of mathematics, for example integrable systems see [7] have developed.

The technical level of many other exciting results sadly precludes discussion here: a small selection of buzzwords could include gluing constructions, regular conformal field equations, the hoop conjecture and the Penrose inequality theorem, isolated and dynamical horizons, and marginally outer trapped surfaces. Numerical relativity had always been known to require the full power of modern supercomputers.

One incidental side-effect was that the supercomputer centre led by Larry Smarr produced the first web browser with a graphical interface, Mosaic. Only in was it realised that the formulations of GR used were only weakly hyperbolic and hence numerically unstable. Such templates can then be used to enable experiments to dig the signal out of the noise in the very delicate gravitational wave detectors coming on stream. Two unexpected outcomes of numerical simulations deserve mention.

One is the discovery of critical phenomena in gravitational collapse by Choptuik. This arose from considering the evolution of a one-parameter family of initial data sets. A boundary was found between those data sets evolving to form black holes, and those dispersing. At the boundary value, the evolved solution showed special features including certain types of continuous or discrete time symmetry, described by scaling laws. The other is the refinement of the Belinskii et al modelling of anisotropic cosmological models, relevant to the initial Big Bang singularity of the Universe.

It would have been hard to predict the relevance of relativity to farming in , but predicting the gravity theory of is probably harder. There are, however, a number of aspects of GR and its uses where effort will clearly be concentrated, because they concern problems already encountered. There are experiments underway, and more planned, to give additional information on most of the cosmological and astrophysical applications of GR.

I shall not attempt a comprehensive list, but just mention a few. Some are directed at characterising the dark matter, dark energy and other unseen constituents: for example, measuring neutrinos to clarify the expected neutrino background left by the Big Bang, using terrestrial detectors for various possible constituents of dark matter, or checking the equation of state of dark energy by detailed observations of the CMB, galaxy distributions and lensing.

Further refinement of CMB results may confirm or disprove the presence of detectable amounts of B-mode polarisation found in by BICEP2 but possibly due to dust : if confirmed, this could come from gravitational waves generated during inflation. One of the most important experiments may prove to be that of the set of large laser interferometric gravitational wave detectors. Early attempts to directly detect gravitational waves used very large cylindrical bars with piezoelectric readouts, later ones being cooled to just above absolute zero to eliminate thermal noise.

Such experiments have achieved their initial design sensitivity. No positive result has been obtained. However, the lack of observed waves has for example, enabled inferences about potential sources. LIGO will soon come back on stream with upgrades that will push the sensitivity to the level where, if our understanding of GR and our knowledge of the formation of compact binaries is correct, we can expect a positive result experts leapt in when a betting firm was offering good odds against such a result.

If we did see nothing, that would perhaps be of even greater interest as showing that our physics or astrophysics is wrong. I began this article by revisiting how SR resolved the tension between Newtonian kinematics and electromagnetism, and GR that between SR and gravity. The tension now, and since the s, is between GR and quantum theory. However, GR cannot be treated by similar methods: it is not renormalisable. We so far have no agreed theory of quantum gravity.