Results 91 to 100 of about 14,713 (200)
Abstract and Applied Analysis, 2014 We apply the Krasnoselskii fixed-point theorem to investigate the existence of multiple positive periodic solutions for a class of impulsive functional differential equations with a parameter; some verifiable sufficient results are established easily. In
Zhenguo Luo
doaj +1 more source
Asymptotic properties of stochastic population dynamics [PDF]
, 2008 In this paper we stochastically perturb the classical Lotka{Volterra model x_ (t) = diag(x1(t); ; xn(t))[b + Ax(t)] into the stochastic dierential equation dx(t) = diag(x1(t); ; xn(t))[(b + Ax(t))dt + dw(t)]: The main aim is to study the asymptotic ...
Deng, Feiqi +6 more
core
On Mathematical Models Based on Delay Differential Equations in Epidemiology
Applied SciencesThis paper examines solutions to mathematical models based on functional-differential equations, which have applications in immunology. This new approach allows us to study discontinuous solutions that more accurately depict real-world phenomena. It also
Mieczysław Cichoń, Kinga Cichoń
doaj +1 more source
Journal of Function Spaces, 2019 We establish novel results on the existence of impulsive problems for fractional differential equations with functional boundary value conditions at resonance with dimKer L=1.
Bingzhi Sun, Shuqin Zhang, Weihua Jiang
doaj +1 more source
Existence of Almost Periodic Solutions for Impulsive Neutral Functional Differential Equations
Abstract and Applied Analysis, 2014 The existence of piecewise almost periodic solutions for impulsive neutral functional differential equations in Banach space is investigated. Our results are based on Krasnoselskii’s fixed-point theorem combined with an exponentially stable strongly ...
Junwei Liu, Chuanyi Zhang
doaj +1 more source
Existence of Fractional Impulsive Functional Integro-Differential Equations in Banach Spaces
Applied System Innovation, 2019 In this paper, we establish the existence of piece wise (PC)-mild solutions (defined in Section 2) for non local fractional impulsive functional integro-differential equations with finite delay.
Dimplekumar Chalishajar +3 more
doaj +1 more source
International Journal of Mathematics and Mathematical Sciences, 2006 A recent nonlinear alternative for contraction maps in Fréchet spaces due to Frigon and Granas is used to investigate the existence and uniqueness of solutions to first-order boundary value problems for impulsive functional differential equations with ...
John R. Graef, Abdelghani Ouahab
doaj +1 more source
Abstract and Applied Analysis, 2012 By using critical point theory and variational methods, we investigate the subharmonic solutions with prescribed minimal period for a class of second-order impulsive functional differential equations.
Qi Wang, Dicheng Lu, Zhaoyue Zheng
doaj +1 more source
Impulsive functional differential equations with variable times
Computers & Mathematics with Applications, 2004 The authors investigate the existence of solutions to a first-order retarded functional-differential equation with impulses. The case including higher-order equations and studied by the same authors can be found in [Dyn. Syst. Appl. 12, No. 3--4, 383--392 (2003; Zbl 1073.34092)].
Benchohra, M. +3 more
openaire +1 more source
An Existence Result for Nonlocal Impulsive Second-Order Cauchy Problems with Finite Delay
Abstract and Applied Analysis, 2013 We deal with the existence of mild solutions of a class of nonlocal impulsive second-order functional differential equations with finite delay in a real Banach space .
Fang Li, Huiwen Wang
doaj +1 more source