Results 271 to 280 of about 8,509,903 (292)

Positive periodic solution of a neutral predator-prey system

Applied Mathematics and Mechanics, 1999
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Existence of positive solutions for period BVPs with Hilfer derivative

Journal of Applied Mathematics and Computing, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Teng Long, Chengfu Li, Jiawei He 0006
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On Positive Periodic Solutions for Nonlinear Delayed Differential Equations

Mediterranean Journal of Mathematics, 2015
Positive \(\omega-\)periodic solutions of the equation \[ \dot x(t) = a(t) g(x(t))x(t) - \lambda b(t) f[x(t-\tau(t))] \] are obtained under the assumption that \(a, b\) and \(\tau\) are nonnegative and \(\omega\)-periodic, and under less restrictive assumptions on the nonlinear functions \(f,g\) than in previous papers.
Hai, D. D., Qian, C.
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Positive doubly periodic solutions of nonlinear telegraph equations

Nonlinear Analysis: Theory, Methods & Applications, 2003
This interesting paper discusses the existence of (weak) solutions (i.e. understood in the distribution sense) to the nonlinear telegraph equation \[ u_{tt}- u_{x,x}+cu_t= -a(t, x)u+ b(t, x) f (t, x, u), \] \((t, x)\in \mathbb{R}^2\) being positive doubly periodic, i.e.
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Positive Periodic Solution for a Nonautonomous Delay Differential Equation

Acta Mathematicae Applicatae Sinica, English Series, 2003
By means of Krasnoselskii's fixed-point theorem, this paper explores the existence of one or multiple positive periodic solutions of nonautonomous differential equations with multiple time lags of the form \[ y'(t)=-a(t)y(t)+f(t,y(t-\tau_1(t)),\dots,y(t-\tau_n(t))) \] and \[ y'(t)=a(t)y(t)-f(t,y(t-\tau_1(t)),\dots,y(t-\tau_n(t))), \] where \(a\in C ...
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On Positive and Periodic Solutions of Riccati Equations

SIAM Journal on Applied Mathematics, 1968
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Existence and exponential stability of positive almost periodic solution for Nicholson-type delay systems

Nonlinear Analysis: Real World Applications, 2011
Wei Chen
exaly  

Positive solution for first-order discrete periodic boundary value problem

Applied Mathematics Letters, 2006
Jian-Ping Sun
exaly  

On positive periodic solution for the delay Nicholson’s blowflies model with a harvesting term

Applied Mathematical Modelling, 2012
Weirui Zhao
exaly  

Positive almost periodic solution for a class of Lasota–Wazewska model with infinite delays

Applied Mathematics and Computation, 2011
Hui Zhou, Zongfu Zhou
exaly