Results 21 to 30 of about 14,986,562 (279)

Even-order differential equation with continuous delay: nonexistence criteria of Kneser solutions

open access: yesAdvances in Difference Equations, 2021
In this paper, we study even-order DEs where we deduce new conditions for nonexistence Kneser solutions for this type of DEs. Based on the nonexistence criteria of Kneser solutions, we establish the criteria for oscillation that take into account the ...
Ali Muhib   +2 more
doaj   +1 more source

Asymptotic Behavior of Solutions of Even-Order Differential Equations with Several Delays

open access: yesFractal and Fractional, 2022
The higher-order delay differential equations are used in the describing of many natural phenomena. This work investigates the asymptotic properties of the class of even-order differential equations with several delays.
Osama Moaaz, Wedad Albalawi
doaj   +1 more source

Higher order parallel splitting methods for parabolic partial differential equations [PDF]

open access: yes, 1995
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The thesis develops two families of numerical methods, based upon new rational approximations to the matrix exponential function, for solving second-order ...
Taj, Malik Shahadat Ali
core   +6 more sources

Oscillation criteria for even order nonlinear neutral differential equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
In this paper, we consider the oscillation criteria for even order nonlinear neutral differential equations of the form $$ \left(r(t)z^{(n-1)}(t)\right)'+q(t)f(x(\sigma(t)))=0, $$ where $z(t)=x(t)+p(t)x(\tau(t)),$ $n\geq2$ is a even integer.
Yibing Sun   +3 more
doaj   +1 more source

Improved criteria for oscillation of noncanonical neutral differential equations of even order

open access: yesAdvances in Difference Equations, 2021
In this work, we aim at studying the asymptotic and oscillatory behavior of even-order neutral delay noncanonical differential equations. To the best of our knowledge, most of the related previous works are concerned only with neutral equations in the ...
Elmetwally M. Elabbasy   +3 more
doaj   +1 more source

Even-Order Neutral Delay Differential Equations with Noncanonical Operator: New Oscillation Criteria

open access: yesFractal and Fractional, 2022
The main objective of our paper is to investigate the oscillatory properties of solutions of differential equations of neutral type and in the noncanonical case. We follow an approach that simplifies and extends the related previous results.
Osama Moaaz   +3 more
doaj   +1 more source

Extrapolation methods for first order ordinary differential equations [PDF]

open access: yes, 1980
Given a system of fist order differential equations, whose coefficient matrix has constant elements, with initial conditions specified, a family of extrapolating algorithms based on Pade approximants to the exponential function is developped.
Twizell, E H
core   +4 more sources

On the Asymptotic Behavior of Advanced Differential Equations with a Non-Canonical Operator

open access: yesApplied Sciences, 2020
In this paper, we aim to study the oscillatory behavior of a class of even-order advanced differential equations with a non-canonical operator. In addition, we present results on the asymptotic behavior of this type of equations and provide an example ...
Omar Bazighifan, Ioannis Dassios
doaj   +1 more source

Oscillation Theorems for Advanced Differential Equations with p-Laplacian Like Operators

open access: yesMathematics, 2020
The main objective of this paper is to establish new oscillation results of solutions to a class of even-order advanced differential equations with a p-Laplacian like operator.
Omar Bazighifan, Poom Kumam
doaj   +1 more source

Linearized Oscillation Results for Even-Order Neutral Differential Equations [PDF]

open access: yesCzechoslovak Mathematical Journal, 2001
The paper deals with the even order nonlinear neutral equation \((1)\) \((x(t)-P(t)g(x(t-\tau )))^{(n)}-Q(t)h(x(t-\sigma ))=0,\) with \(P,Q\in C([t_0,\infty ),\mathbb R),\) \(g,h\in C (\mathbb R,\mathbb R),\) \(\tau >0,\) \(\sigma \geq 0\) and \(t_0\in \mathbb R.\) In particular, linearized oscillation results for \((1)\) are obtained also in the cases
Shen, J. H., Yu, J. S.
openaire   +1 more source

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