A local characterization of Schwarzschild and Reissner metrics is made by using the concepts of infinitesimal null anisotropy (or equivalently, infinitesimal isotropy) and weak affinity.


A theoretical study on nitrourea and its tautomers
Türker, Burhan Lemi; Gumus, Selcuk; Atalar, Taner; Atlanel, Sencer (Informa UK Limited, 2008-01-01)
In the present study, nitrourea and its possible tautomers have been subjected to theoretical analysis by performing Hartree-Fock and also density functional theory (DFT) calculations. The optimized geometries, vibrational frequencies, and some thermodynamical values for the presently considered species have been obtained in their ground states.
The radiative K* meson decays in QCD
Alıyev, Tahmasıb; Iltan, E (Springer Science and Business Media LLC, 1996-06-01)
The g(K0*K0 gamma) and g(K+*K+gamma) coupling constants and the radiative decay widths are calculated in the context of QCD sum rules. It is found that the discrepancy between the experimental data and theoretical results still exists.
A Finite Volume Method for the Relativistic Burgers Equation on a FLRW Background Spacetime
Ceylan, Tuba; Lefloch, Philippe G.; Okutmuştur, Baver (Global Science Press, 2018-02-01)
A relativistic generalization of the inviscid Burgers equation was introduced by LeFloch and co-authors and was recently investigated numerically on a Schwarzschild background. We extend this analysis to a Friedmann-Lemaitre-Robertson-Walker (FLRW) background, which is more challenging due to the existence of time-dependent, spatially homogeneous solutions. We present a derivation of the model of interest and we study its basic properties, including the class of spatially homogeneous solutions. Then, we des...
A First-Order Linear Model for the Estimation of Detonation Velocity
Türker, Burhan Lemi (Informa UK Limited, 2011-01-01)
A linear multivariable model has been derived for the estimation of detonation velocity. Then, its two simplified forms, first-order linear models, have been proposed as estimators of detonation velocities of a large population of explosives having different skeletal structures. Then, the models are analyzed mathematically and regression equations are obtained and discussed. The first model possesses two independent variables E/M and density, whereas the second one is based on E/M only. The total energy (E)...
Shortcuts to high symmetry solutions in gravitational theories
Deser, S; Tekin, Bayram (IOP Publishing, 2003-11-21)
We apply the Weyl method, as sanctioned by Palais' symmetric criticality theorems, to obtain those-highly symmetric-geometries amenable to explicit solution, in generic gravitational models and dimension. The technique consists of judiciously violating the rules of variational principles by inserting highly symmetric, and seemingly gauge fixed, metrics into the action, then varying it directly to arrive at a small number of transparent, indexless, field equations. Illustrations include spherically and axial...
Citation Formats
E. GARCIARIO and D. KUPELI, “A LOCAL CHARACTERIZATION OF SCHWARZSCHILD AND REISSNER METRICS,” GENERAL RELATIVITY AND GRAVITATION, pp. 1233–1248, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64713.