Computational and numerical simulations of nonlinear fractional Ostrovsky equation
Alexandria Engineering Journal, 2022 This article investigates the accuracy of the obtained analytical solutions of the nonlinear fractional Ostrovsky (NLFO.) equation. The researched solutions are obtained by exploiting the well-known generalized Tanh–function (GTF.) method with the ...
Mohamed Omri +4 more
doaj +1 more source
General relativistic gravitational field of a rigidly rotating disk of dust: Solution in terms of ultraelliptic functions [PDF]
, 2002 In a recent paper we presented analytic expressions for the axis potential, the disk metric, and the surface mass density of the global solution to Einstein's field equations describing a rigidly rotating disk of dust.
A. Göpel +11 more
core +1 more source
Unification Principle and a Geometric Field Theory
Open Physics, 2015 In the context of the geometrization philosophy, a covariant field theory is constructed. The theory satisfies the unification principle. The field equations of the theory are constructed depending on a general differential identity in the geometry used.
Wanas Mamdouh I. +2 more
doaj +1 more source
Wave polarizations for a beam-like gravitational wave in quadratic curvature gravity [PDF]
, 2003 We compute analytically the tidal field and polarizations of an exact gravitational wave generated by a cylindrical beam of null matter of finite width and length in quadratic curvature gravity.
Buchdahl H A +7 more
core +1 more source
Probability for Primordial Black Holes in Higher Derivative Theories [PDF]
, 2001 The probability for quantum creation of an inflationary universe with a pair of black holes in higher derivative theories has been studied. Considering a gravitational action which includes quadratic ($\alpha R^{2}$) and/or cubic term ($\beta R^{3}$) in ...
ARINDAM SAHA +5 more
core +3 more sources
Spacetime Defects: Torsion Loops [PDF]
, 1995 Spacetimes with everywhere vanishing curvature tensor, but with torsion different from zero only on world sheets that represent closed loops in ordinary space are presented, also defects along open curves with end points at infinity are studied. The case
Letelier, Patricio S.
core +3 more sources
Numerical solution of two dimensional time fractional-order biological population model
Open Physics, 2016 In this work, we provide an approximate solution of a parabolic fractional degenerate problem emerging in a spatial diffusion of biological population model using a fractional variational iteration method (FVIM).
Prakash Amit, Kumar Manoj
doaj +1 more source
Scaling Solutions and reconstruction of Scalar Field Potentials [PDF]
, 2001 Starting from the hypothesis of scaling solutions, the general exact form of the scalar field potential is found. In the case of two fluids, it turns out to be a negative power of hyperbolic sine.
C. Uggla +22 more
core +3 more sources
Exact solutions of equal-width equation and its conservation laws
Open Physics, 2019 In this work we investigate the equal-width equation, which is used for simulation of (1-D) wave propagation in non-linear medium with dispersion process.
Khalique Chaudry Masood +2 more
doaj +1 more source
Gravitational Collapse of Dust with a Cosmological Constant [PDF]
, 2000 The recent analysis of Markovic and Shapiro on the effect of a cosmological constant on the evolution of a spherically symmetric homogeneous dust ball is extended to include the inhomogeneous and degenerate cases.
A. G. Riess +16 more
core +2 more sources