Results 21 to 30 of about 3,885 (102)
Journal of Function Spaces, Volume 2022, Issue 1, 2022., 2022 In this paper, we obtain the novel exact traveling wave solutions in the form of trigonometric, hyperbolic and exponential functions for the nonlinear time fractional generalized reaction Duffing model and density dependent fractional diffusion‐reaction equation in the sense of beta‐derivative by using three fertile methods, namely, Generalized tanh ...
Imran Siddique +5 more
wiley +1 more source
Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022 In this study, we used the newly established optimal approach, namely, optimal auxilary function method (OAFM) along with the Adams numerical solver technique in order to investigate the heat transfer between two permeable parallel plates of steady nanofluids (HTBTP‐SNFs) through Brownian and thermophoretic consequences.
Hakeem Ullah +5 more
wiley +1 more source
IET Microwaves, Antennas &Propagation, Volume 15, Issue 10, Page 1249-1269, 12 August 2021., 2021 Abstract The radiation of a double‐layer spherical dielectric lens equipped with a conformal spherical‐disk PEC reflector and excited by elementary sources located on the antenna axis of rotation is considered. The sources are either a radial electric dipole or a tangential magnetic dipole.
Maria E. Tikhenko +3 more
wiley +1 more source
A counterexample to the composition condition conjecture for polynomial Abel differential equations [PDF]
Ergodic Theory and Dynamical Systems, 2017 Polynomial Abel differential equations are considered a model problem for the classical Poincaré center–focus problem for planar polynomial systems of ordinary differential equations. In the last few decades, several works pointed out that all centers of
J. Giné, M. Grau, Xavier Santallusia
semanticscholar +1 more source
Ordinary differential equations defined by a trigonometric polynomial field: behaviour of the solutions [PDF]
Dynamical systems, 2019 We consider the ordinary differential equations defined by a trigonometric polynomial field and we prove that any solution x admits a rotation vector . More precisely, the function is bounded on time and it is a weak almost periodic function of slope ρ.
Walid Oukil
semanticscholar +1 more source
Planar systems and Abel equations
Communications on Pure and Applied Analysis, 2022 The aim of this paper is to determine when polynomial planar systems can be reduced to Abel equations. The study is based on earlier works by Christopher, Devlin, Lloyd, and Pearson.
A. Álvarez, J. L. Bravo, F. Sánchez
semanticscholar +1 more source
Proceedings of the London Mathematical Society, Volume 121, Issue 4, Page 954-1032, October 2020., 2020 Abstract I provide an explicit construction of spectral curves for the affine E8 relativistic Toda chain. Their closed‐form expression is obtained by determining the full set of character relations in the representation ring of E8 for the exterior algebra of the adjoint representation; this is in turn employed to provide an explicit construction of ...
Andrea Brini
wiley +1 more source
On Bohr's theorem for general Dirichlet series
Mathematische Nachrichten, Volume 293, Issue 8, Page 1591-1612, August 2020., 2020 Abstract We present quantitative versions of Bohr's theorem on general Dirichlet series D=∑ane−λns assuming different assumptions on the frequency λ=(λn), including the conditions introduced by Bohr and Landau. Therefore, using the summation method by typical (first) means invented by M.
I. Schoolmann
wiley +1 more source
Existence of Multiple Periodic Solutions for Cubic Nonautonomous Differential Equation
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 In this article, approaches to estimate the number of periodic solutions of ordinary differential equation are considered. Conditions that allow determination of periodic solutions are discussed. We investigated focal values for first‐order differential nonautonomous equation by using the method of bifurcation analysis of periodic solutions from a fine
Saima Akram +5 more
wiley +1 more source
Universal centers in the cubic trigonometric Abel equation [PDF]
, 2014 We study the center problem for the trigonometric Abel equation $d \rho/ d \theta= a_1 (\theta) \rho^2 + a_2(\theta) \rho^3,$ where $a_1(\theta)$ and $a_2(\theta)$ are cubic trigonometric polynomials in $\theta$.
Giné, Jaume +2 more
core +5 more sources