Results 31 to 40 of about 10,432 (131)

Permanence and existence of periodic solution of a discrete periodic Lotka–Volterra competition system with feedback control and time delays

Nonlinear Analysis, 2015
In this paper, we consider a discrete predator–prey system with feedback and time delays. By applying the theory of difference inequality, as well as analysis technique, sufficient conditions are obtained for the permanence of the system. And by applying
Wenbin Li, Zengji Du, Dongcheng Xu
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Existence of positive periodic solution of a periodic cooperative model with delays and impulses

International Journal of Mathematics and Mathematical Sciences, 2006
Sufficient conditions are obtained for the existence of at least one positive periodic solution of a periodic cooperative model with delays and impulses by using Mawhin's continuation theorem of coincidence degree theory.
Yongkun Li, Wenya Xing
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Periodic solutions for p-Laplacian functional differential equations with two deviating arguments

Electronic Journal of Differential Equations, 2011
Using the theory of coincidence degree, we prove the existence of periodic solutions for the p-Laplacian functional differential equations with deviating arguments.
Changxiu Song, Xuejun Gao
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A boundary value problem of fractional order at resonance

Electronic Journal of Differential Equations, 2010
We establish solvability of a boundary value problem for a nonlinear differential equation of fractional order by means of the coincidence degree theory.
Nickolai Kosmatov
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Positive Almost Periodic Solutions for a Time-Varying Fishing Model with Delay

International Journal of Differential Equations, 2011
This paper is concerned with a time-varying fishing model with delay. By means of the continuation theorem of coincidence degree theory, we prove that it has at least one positive almost periodic solution.
Xia Li, Yongkun Li, Chunyan He
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Periodic solutions for a delay model of plankton allelopathy on time scales

Electronic Journal of Qualitative Theory of Differential Equations, 2011
In this paper, a delay model of plankton allelopathy is investigated. By using the coincidence degree theory, sufficient conditions for existence of periodic solutions are obtained.
Zhaohui Wen, Kejun Zhuang
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Solvability of (k,n-k) conjugate boundary-value problems at resonance

Electronic Journal of Differential Equations, 2012
Using the coincidence degree theory due to Mawhin and constructing suitable operators, we prove the existence of solutions for (k,n-k) conjugate boundary-value problems at resonance.
Weihua Jiang, Jiqing Qiu
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Solvability of a third-order differential equation with functional boundary conditions at resonance

Boundary Value Problems, 2017
By using the coincidence degree theory due to Mawhin and constructing suitable operators, we study the existence of solutions for a third-order functional boundary value problem at resonance with dim Ker L = 1 $\operatorname{dim } \operatorname{Ker}L=1$ .
Weihua Jiang, Nickolai Kosmatov
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Neutral Operator and Neutral Differential Equation

Abstract and Applied Analysis, 2011
In this paper, we discuss the properties of the neutral operator (Ax)(t)=x(t)−cx(t−δ(t)), and by applying coincidence degree theory and fixed point index theory, we obtain sufficient conditions for the existence, multiplicity, and nonexistence of ...
Jingli Ren, Zhibo Cheng, Stefan Siegmund
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Periodic solutions for a second-order neutral differential equation with variable parameter and multiple deviating arguments

Electronic Journal of Differential Equations, 2010
By employing the continuation theorem of coincidence degree theory developed by Mawhin, we obtain periodic solution for a class of neutral differential equation with variable parameter and multiple deviating arguments.
Bo Du, Xiaojing Wang
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