Results 11 to 20 of about 258,095 (265)
Quasi-Hyperbolically Symmetric γ-Metric
Entropy, 2023 We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi-hyperbolically symmetric γ-metric. The geodesic equations are written and analyzed in detail. The obtained results are contrasted with
Luis Herrera +3 more
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In search of exact solutions [PDF]
Nature, 2001 Many-body systems, such as electrons flowing in a superconductor, are among the most difficult theoretical problems to study. A new family of exactly solvable models may offer some answers.
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Journal of Primary Care & Community Health, 2021 Introduction/Objectives: Despite compelling evidence of clinical and economic benefits, adherence to colorectal cancer (CRC) screening remains low. Increasing public awareness through various outreach methods may improve screening uptake.
Martha E. Shepherd +3 more
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Spherically Symmetric C3 Matching in General Relativity
Universe, 2023 We study the problem of matching interior and exterior solutions to Einstein’s equations along a particular hypersurface. We present the main aspects of the C3 matching approach that involve third-order derivatives of the corresponding metric tensors in ...
Hernando Quevedo
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Physics Letters B, 2021 We show, in detail, that the only non-trivial black hole (BH) solutions for a neutral as well as a charged spherically symmetric space-times, using the class F(R)=R±F1(R), must-have metric potentials in the form h(r)=12−2Mr and h(r)=12−2Mr+q2r2.
G.G.L. Nashed
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Exact solutions of (0,2) Landau-Ginzburg models
Journal of High Energy Physics, 2020 In this paper we study the low energy physics of Landau-Ginzburg models with N $$ \mathcal{N} $$ = (0, 2) supersymmetry. We exhibit a number of classes of relatively simple LG models where the conformal field theory at the low energy fixed point can be ...
Abhijit Gadde, Pavel Putrov
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Exact Solutions in Modified Gravity Models
Entropy, 2012 We review the exact solutions in modified gravity. It is one of the main problems of mathematical physics for the gravity theory. One can obtain an exact solution if the field equations reduce to a system of ordinary differential equations. In this paper
Valery V. Obukhov, Andrey N. Makarenko
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Exact Solutions of Fuzzy Linear System Equations
Fuzzy Optimization and Modeling, 2023 Systems of simulations linear equations play major role in various areas such as mathematics, statistics, and social sciences. Since in many applications, at least some of the system’s parameters and measurements are represented by fuzzy rather than ...
Mohammad Adabitabar Firozja +1 more
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An exact interior Kerr solution [PDF]
New Astronomy, 2018 We present a simple exact solution for the interior of a rotating star. The interpretation of the stress energy tensor as that of a fluid requires the existence of a high viscosity, which is quite expected for a rotating fluid. In spite of the negative stresses, energy conditions are in fact all satisfied.
Ravi, Aravind P, Banerjee, Narayan
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Anisotropic Stars: Exact Solutions [PDF]
General Relativity and Gravitation, 2002 We study the effects of anisotropic pressure on the properties of spherically symmetric, gravitationally bound objects. We consider the full general relativistic treatment of this problem and obtain exact solutions for various form of equations of state connecting the radial and tangential pressures.
Dev, Krsna, Gleiser, Marcelo
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