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In this paper, the well known oscillation criteria due to Hille and Nehari for second-order linear differential equations will be generalized and extended to the third-order nonlinear dynamic equation
(r2(t)((r1(t)xΔ(t))Δ)γ)Δ+q(t)f(x(t))=0  相似文献   

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In this paper, we consider a higher order difference equation of the form
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This paper is devoted to the existence of solutions for a problem of first order difference equations with maxima and with nonlinear functional boundary value conditions. Such boundary conditions include, among others, initial, periodic, antiperiodic and multipoint boundary value conditions, as particular cases.  相似文献   

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In this paper, we study the oscillation of a third-order nonlinear difference equation with impulses. Some sufficient conditions for the oscillatory behavior of solutions of third-order impulsive nonlinear difference equation are obtained. Some known results in the literature are generalized and improved.  相似文献   

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Recently S. Shimomura has shown that the polynomial difference equationw(z + 1) =P(w(z)), whereP is a given polynomial of degree at least two, always has entire non-constant solutions. The present investigation shows how to construct all entire solutions of the equation and discusses some properties of the solutions.  相似文献   

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We consider the difference equation with continuous argument
where > 0, t [0, ), and f: [0, ) × R R. Conditions for the existence and uniqueness of continuous asymptotically periodic solutions of this equation are given. We also prove the following result: Let x(t) be a real continuous function such that
for some R. Then it always follows from the boundedness of x(t) that
t if and only if R {1}.Published in Ukrainskyi Matematychnyi Zhurnal, Vol. 56, No. 8, pp. 1095–1100, August, 2004.  相似文献   

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Applying an Abstract Interpolation Lemma, we showed persistence of solutions of the initial value problem to higher order nonlinear Schrödinger equation, also called Airy-Schrödinger equation, in weighted Sobolev spaces X2,θ, for θ∈[0,1].  相似文献   

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In this paper we prove two results. The first is an extension of the result of G. D. Jones [4[:Every nontrivial solution for
must be unbounded, provided , in and for every bounded subset I, f(t, z) is bounded in E × I.(B) Every bounded solution for , in , must be constant, provided in and for every bounded subset I, is bounded in .  相似文献   

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The main objective of this paper is to study the global stability of the positive solutions and the periodic character of the difference equation
yn+1=ayn+byn?t+cyn?l+dyn?k+eyn?sαyn?k+βyn?s,n=0,1,,
with positive parameters and non-negative initial conditions. Numerical examples to the difference equation are given to explain our results.  相似文献   

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Asymptotic behavior of a nonlinear delay difference equation   总被引:1,自引:0,他引:1  
This paper considers a class of nonlinear difference equations
Δ3yn + ƒ(n, yn, ynr) = 0, n N (n0)
. A necessary and sufficient condition for the existence of a bounded nonoscillatory solution is given.  相似文献   

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In this paper, we investigate the oscillation of Third-order difference equation with impulses. Some sufficient conditions for the oscillatory behavior of the solutions of Third-order impulsive difference equations are obtained.  相似文献   

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