Results 11 to 20 of about 2,522,381 (292)

The Correlated Lloyd model: exact solution [PDF]

open access: yesTheoretical and Mathematical Physics, 2014
Exactly solvable model of disordered system representing the generalized Lloyd model with correlated random potential is described. It is shown, that for the model under consideration, the averaged Green's function does not depend on random potential ...
Kozlov, G. G.
core   +3 more sources

An Exact Interior Kerr Solution [PDF]

open access: yesNew Astronomy, 2017
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.
Banerjee, Narayan, Ravi, Aravind P
core   +2 more sources

Analytical and Numerical Solution of Heat Transfer Equation in Rectangular Composite Fins [PDF]

open access: yesMechanics of Advanced Composite Structures, 2022
Today, the use of composites has received widespread attention due to their special properties that cannot be found in alloys. Kevlar-Epoxy composite is one of the most widely used materials. In this paper, we analyze the heat transfer in rectangular fin
Mohsen Hajinejad Sorkhi   +1 more
doaj   +1 more source

Exact and Approximate Solutions for Some Classes of the Inhomogeneous Pantograph Equation

open access: yesAxioms, 2023
The standard pantograph delay equation (SPDDE) is one of the famous delay models. This standard model is basically homogeneous in nature and it has been extensively studied in the literature. However, the studies on the general inhomogeneous form of such
A. A. Al Qarni
doaj   +1 more source

EXACT INFLATIONARY SOLUTIONS [PDF]

open access: yesInternational 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
openaire   +3 more sources

New Anisotropic Exact Solution in Multifield Cosmology

open access: yesUniverse, 2021
In the case of two-scalar field cosmology, and specifically for the Chiral model, we determine an exact solution for the field equations with an anisotropic background space.
Andronikos Paliathanasis
doaj   +1 more source

Exact Solution of Schrödinger Equation for Pentaquark Systems [PDF]

open access: yesMathematics Interdisciplinary Research, 2023
‎In this paper‎, ‎we present an exact analytical solution for five interacting quarks‎. ‎We solve the Schr\"{o}dinger equation for pentaquarks in the framework of five-body and two-body problems‎.
Narges Tazimi   +2 more
doaj   +1 more source

Sampling moiré method: A more exact solution

open access: yesResults in Optics, 2023
An important task in the sampling moiré method is phase measurement of a grating image by using the phase of the moiré fringe from a single-shot image.
Mohammad Abolhassani
doaj   +1 more source

A Study of Traveling Wave Structures and Numerical Investigations into the Coupled Nonlinear Schrödinger Equation Using Advanced Mathematical Techniques

open access: yesMathematics, 2023
This article explores adapted mathematical methods to solve the coupled nonlinear Schrödinger (C-NLS) equation through analytical and numerical methods.
Taghread Ghannam Alharbi   +1 more
doaj   +1 more source

New waves solutions of the (2+1)-dimensional generalized Hirota–Satsuma–Ito equation using a novel expansion method

open access: yesResults in Physics, 2023
Numerous scientific fields depend on precise solutions, which can be obtained for nonlinear partial differential equations (PDEs) through various techniques. It is important to note that solutions obtained through different approaches can vary.
Saqib Khaliq   +5 more
doaj   +1 more source

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