Results 1 to 10 of about 249,487 (145)
Fractal and Fractional, 2023 This paper studies the bifurcations of the exact solutions for the time–space fractional complex Ginzburg–Landau equation with parabolic law nonlinearity.
Wenjing Zhu +3 more
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EXACT INFLATIONARY SOLUTIONS [PDF]
International Journal of Modern Physics D, 1998 We present a new class of exact inflationary solutions for the evolution of a universe with spatial curvature, filled with a perfect fluid, a scalar field with potential V±(ϕ) = λ(ϕ2 ± δ2)2 and a cosmological constant Λ. With the V+(ϕ) potential and a negative cosmological constant, the scale factor experiments a graceful exit.
Piccinelli, Gabriella +2 more
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Cosmological Solutions of Integrable F(R) Gravity Models with an Additional Scalar Field
Physical Sciences Forum, 2023 We consider F(R) cosmological models with a scalar field. For the R2 model in the spatially flat Friedmann–Lemaître–Robertson–Walker metric, the Ricci scalar R can smoothly change its sign during the evolution if and only if the scalar field is a phantom
Sergey Vernov, Vsevolod Ivanov
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New traveling wave exact solutions to the coupled Klein–Gordon system of equations
Partial Differential Equations in Applied Mathematics, 2022 A system of coupled Klein–Gordon nonlinear partial differential equations are considered in this paper and several new families of exact solutions for this system are derived.
Subin P. Joseph
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Results in Physics, 2023 Nonlinear Burgers equation with variable coefficients (BEVC) which involves mathematical physics in plasma and fluid dynamics and so on. Investigating the exact solutions of BEVC to show the different dynamics of wave phenomena becomes a hot topic both ...
Jianming Qi, Qinghao Zhu
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Riemann Problems and Exact Solutions for the p-System
Mathematics, 2022 In this paper, within the framework of the Method of Differential Constraints, the celebrated p-system is studied. All the possible constraints compatible with the original governing system are classified.
Natale Manganaro, Alessandra Rizzo
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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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Exact anyon black hole solutions
European Physical Journal C: Particles and Fields, 2018 We present the exact anyon solutions and study their energy conditions. It is shown that the exact anyon VdW solutions with $$b>0$$ b>0 are physically un-acceptable.
Wei Xu
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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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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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