Results 41 to 50 of about 8,969,614 (208)
The exact cosmological solutions for tachyon fields
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011 The application of the method of super-potential to the solution of the problems of cosmology with the tachyon fields is examined. The classes of exact solutions are found and the periods of time with the predominance of dark energy are established.
M. Sami, O. G. Panina, S. V. Chervon
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Exact solutions of conformable fractional differential equations
Results in Physics, 2021 This article is about to formulate exact solutions of the time fractional Dodd-Bullough-Mikhailov (DBM) equation, Sinh-Gordon equation and Liouville equation by utilizing simplest equation method (SEM) in conformable fractional derivative (CFD) sense ...
Haleh Tajadodi +5 more
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Exact solutions for hydrodynamic interactions of two squirming spheres [PDF]
Journal of Fluid Mechanics, 2016 We provide exact solutions of the Stokes equations for a squirming sphere close to a no-slip surface, both planar and spherical, and for the interactions between two squirmers, in three dimensions.
Dario Papavassiliou, G. P. Alexander
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On Solving the Knapsack Problem with Conflicts
MathematicsA variant of the well-known Knapsack Problem is studied in this paper. In the classic problem, a set of items is given, with each item characterized by a weight and a profit.
Roberto Montemanni, Derek H. Smith
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Exact solutions in massive gravity [PDF]
Classical and Quantum Gravity, 2013 17 pages, 4 figures.
Tasinato, Gianmassimo +2 more
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Exact solution of the infrared problem [PDF]
Physical Review D, 1983 A simple but rigorous solution of the infrared problem is obtained. The basis of this solution is a factorization of the operator corresponding to the Feynman coordinate space plus all electromagnetic corrections to it into a product of two operators. The first is a unitary operator that represents precisely the contribution corresponding to classical ...
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Asymmetric inflation: Exact solutions [PDF]
Physical Review D, 2006 We provide exact solutions to the Einstein equations when the Universe contains vacuum energy plus a uniform arrangements of magnetic fields, strings, or domain walls. Such a universe has planar symmetry, i. e., it is homogeneous but, not isotropic. Further exact solutions are obtained when dust is included and approximate solutions are found for $w ...
Buniy, Roman V. +2 more
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On exact solutions of a degenerate quasilinear wave equation with source term
Electronic Journal of Differential Equations, 2006 In this paper, we construct exact solutions of the Cauchy problem of degenerate quasilinear wave equation of Kirchhoff type, and study the effect of the nonlinear terms on the existence of solutions.
Nour-Eddine Amroun, Abbes Benaissa
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Decomposition of ordinary differential equations
Bulletin of Mathematical Sciences, 2017 Decompositions of linear ordinary differential equations (ode’s) into components of lower order have successfully been employed for determining their solutions. Here this approach is generalized to nonlinear ode’s. It is not based on the existence of Lie
Fritz Schwarz
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The exact cosmological solutions for phantom fields
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011 The application of the method of super-potential to solution of the problems of cosmology with phantom fields is examined. The classes of exact solutions are found and the periods of time with the predominance of dark energy are established.
S. V. Chervon, O. G. Panina
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