Positive periodic solutions
Positive periodic solutions for third order ordinary differential equations with delay
... of periodic solutions for delayed differential equations is an important research topic in ODE qualitative analysis, which has wide applications in mechanics, physics, ecology, economics, and other ...
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Positive periodic solutions for p-Laplacian neutral differential equations with a singularity
... of positive periodic solutions for some types of differential equations with a singularity have been obtained; see [–] and the references cited ...the periodic solutions for the ...
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Positive periodic solutions for a second-order functional differential equation
... to periodic problems of the second-order delay equation () as well as Equation () (for Equation (), see ...of positive periodic solutions of Equation ...
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Positive periodic solutions for neutral multi delay logarithmic population model
... of positive periodic solutions for neutral loga- rithmic population model with multiple ...following periodic neutral multi-delay logarithmic population ...
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Positive periodic solutions of a discrete mutualism model with time delays
... . (1.2) The exponential form of (1.2) is more biologically reasonable than that directly derived by replacing the differential by difference in (1.1). Our purpose in this paper is to use Mawhin’s continuous theorem [3] to ...
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Positive periodic solutions of second order difference equations with weak singularities
... Positive periodic solutions of second-order difference equations have been studied by many authors, see ...the positive periodic solutions of the ...
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Positive periodic solutions of functional discrete systems and population models
... x(n + 1) = a(n)x(n) + h(n) f x n − τ(n) , (1.2) where a(n), h(n), and τ(n) are ω-periodic for ω an integer with ω ≥ 1. Under the assump- tions that a(n), f (x), and h(n) are nonnegative with 0 < a(n) < 1 for ...
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Positive Periodic Solutions of Second Order Functional Differential Equation with Impulses
... This paper studied the existence problem for a second order impulsive functional differential equations. Some ex- istence results of multiplicity positive periodic solutions are obtained. The proof ...
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Positive periodic solutions for second order differential equations with impulsive effects
... decades. Periodic solutions and periodic boundary value problems of impulsive differential equations have received considerable attention and much literature has been published; for instance, see ...
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Existence and n-multiplicity of positive periodic solutions for impulsive functional differential equations with two parameters
... of positive periodic solutions for the periodic impulsive functional differential equations with two ...of positive periodic solutions of the impulsive functional ...
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Positive Periodic Solutions in Shifts Delta(+/-) for a Neutral Dynamic Equation on Time Scales
... Abstract—In this paper, based on the theory of calculus on time scales, by using Krasnoselskii’s fixed point theorem and contraction mapping principle, sufficient conditions are established for the existence of ...
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On positive periodic solutions of second order difference equations with attractive repulsive singularities
... of positive periodic solutions for second-order difference ...lower solutions, coincidence degree theory, and critical point theory, a se- ries of existence results of periodic ...
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Existence of Positive Periodic Solutions to Species Nonautonomous Food Chains with Harvesting Terms
... a periodic environment is the global existence and stability of a positive periodic solution, which plays a similar role as a globally stable equilibrium does in an autonomous model, this motivates ...
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Existence of Positive Periodic Solutions for a Third-Order Delay Differential Equation
... The organization of this paper is as follows. In section 2, we introduce some notations and lemmas, and state some preliminary results needed in later section, then we give the Green’s function of (1.1), which plays an ...
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Existence of positive periodic solutions for abstract evolution equations
... only positive periodic solutions are significant, moti- vated by the papers mentioned above, we research the existence of positive ω-periodic mild solutions for ...the ...
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Positive periodic solutions for nonlinear difference equations via a continuation theorem
... Here we will invoke a continuation theorem of Mawhin for obtaining such solutions. More specifically, let X and Y be two Banach spaces and L : Dom L ⊂ X → Y is a linear mapping and N : X → Y a continuous mapping ...
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Bifurcation of positive periodic solutions of first-order impulsive differential equations
... Remark . There are many papers which get the positive solutions using bifurcation from the interval. For example, see [, ]. However, in those papers, the linear operator corresponding problem is ...
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On positive periodic solutions of second order singular equations
... the following vector version of Krasnosel’skii’s fixed point theorem [14]. In addition, there are many papers concerned with the existence and multiplicity of radial solutions of the elliptic equations with the ...
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Positive periodic solutions for nonlinear first-order delayed differential equations at resonance
... For simplicity, we say a function q 0 provided that q : R → (0, ∞ ) is ω-periodic and continuous. If q : R → [0, ∞ ) is ω-periodic and continuous with 0 ω q(t) dt > 0, then it’s denoted as q 0. Thus, if ...
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Existence of Positive Periodic Solutions for a Time Delay Biological Model
... There is still less research work of the model which cannot exist independently. The existing researches basi- cally are the autonomous models (see [3] and [4]). In this paper, we establish a Lotka-Volterra model with ...
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