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Oscillation of Neutral Functional Differential Equations

Acta Mathematica Hungarica, 2000
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OSCILLATIONS OF NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS

Acta Mathematica Scientia, 1992
This paper presents sufficient conditions for all the solutions of some classes of neutral functional differential equations (NFDE) to oscillate. Under consideration are (i) a class of NFDE of retarded type \[ [x(t)- px(t-\tau)]'+\sum^ n_{i=1}q_ ix(t-\sigma_ i)=0, \tag{1} \] where \(p\geq 0\), \(\tau\), \(q_ i\) and the \(\sigma_ i\) are positive ...
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Spline Approximations for Neutral Functional Differential Equations

SIAM Journal on Numerical Analysis, 1981
Based on an abstract approximation theorem for ${\text{C}}_0 $-semigroups (Trotter–Kato theorem) we present an algorithm where linear autonomous functional-differential equations of neutral type are approximated by sequences of ordinary differential equations of increasing dimensions.
Kappel, F., Kunisch, K.
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Oscillation of second order half-linear neutral differential equations with weaker restrictions on shifted arguments

Mathematica Slovaca, 2020
Neutral differential equations are one of the most important extensions of classical ordinary differential equations and aim to give a better explanation for modeling phenomena where ordinary differential equations are insufficient.
Simona Fisnarová, R. Mařík
semanticscholar   +1 more source

PERIODIC SOLUTIONS OF NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS

Acta Mathematica Scientia, 2001
The problem of periodic solutions for nonlinear neutral functional-differential equations \[ \frac{d}{dt}D(t, x_t)=f(t,x_t) \] is discussed by using coincidence degree theory. A new result on the existence of periodic solutions is obtained.
Peng, Shiguo, Zhu, Siming
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LOGISTIC DIFFERENTIAL EQUATION OF NEUTRAL TYPE

1997
The following logistic neutral functional-differential equation describes some type of population dynamics (consistent with the experiment on the population of Daphnia magna) accounting retardation due to the processes of growing up and maturation: \[ N'=rN\left(1- {N(t-h)+\rho N'(t-h)\over K}\right) . \] The boundedness and asymptotic stability of its
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Zero-Hopf Calculations for Neutral Differential Equations

Journal of Dynamics and Differential Equations, 2023
The paper focusses on necessary conditions to guarantee the existence of the zero-Hopf singularity for differential equations of neutral type. Consider a neutral functional differential equation \[ \dot{z}(t) +E \dot{z}(t-\tau)= A(\epsilon)z(t)+B(\epsilon)z(t-\tau)+F(z(t),z(t-\tau),\epsilon)\tag{1} \] where \( z\in \mathbb{R}^n, \epsilon \in \mathbb{R}^
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Neutral Functional Differential Equations

1999
The present chapter contains some remarks and ideas concerning application of i—smooth calculus to functional differential equations of neutral type. Taking into account essential features of neutral functional differential equations (NFDE) subsequent elaboration of these aspects requires additional investigating properties of invariant differentiable ...
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Second Order Abstract Neutral Functional Differential Equations

Journal of Dynamics and Differential Equations, 2015
In this paper, the authors study abstract second order neutral functional-differential equations with finite delay in a Banach space (existence and uniqueness of mild and classical solutions of abstract Cauchy problems). The reader can find, results on the existence of mild solutions of second order semilinear Cauchy problems, a variation of constants ...
Henríquez, Hernán R., Cuevas, Claudio
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Oscillatory Phenomena in Neutral Delay Differential Equations

Acta Mathematica Hungarica, 1997
Consider the general odd-order delay differential equation of the type \[ x^{(n)}(t)+\sum^m_{i=1} q_ix(t-\sigma_i)=0. \tag{*} \] The authors show that if \(n\) is odd and \[ \frac 1n \left(\sum^m_{i=1}\sigma^n_i q_i\right)^{1/n}>\frac 1e \] then every solution to (*) oscillates.
Das, P., Mishra, B. B.
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