Oscillation of nonlinear impulsive partial difference equations with continuous variables

By employing a difference inequality without impulses, we establish several sufficient conditions for the oscillation of solutions of a class of nonlinear impulsive partial difference equations with continuous variables.     

Oscillation of certain partial difference equations

In this paper we consider a class of nonlinear delay partial difference equations and a class of linear delay partial difference equations with variable coefficients, which may change sign. We obtain oscillation criteria for these equations. There are no results for the oscillation of these equations up to now.     

Oscillation criteria for a class of neutral difference equations with continuous variable

In this paper, we are mainly concerned with oscillatory behaviour of solutions for a class of second order nonlinear neutral difference equations with continuous variable. Using an integral transformation, the Riccati transformation and iteration, some oscillation criteria are obtained.     

Oscillation for linear non-autonomous systems of difference equations with continuous arguments

In this paper, we establish sufficient conditions for the oscillation of the linear non-autonomous systems of difference equations with continuous arguments

     

A remark for “Oscillation theorems for second-order nonlinear partial difference equations”

In this remark, we shall show a counter example for the main result of the paper [S.T. Liu, Y.Q. Liu, Oscillation theorems for second-order nonlinear partial difference equations, J. Comput. Appl. Math. 132 (2001) 479-482].     

脉冲时滞差分方程非振动解的存在性

讨论脉冲时滞差分方程 给出了由时滞差分方程非振动解的存在性刻划出相应的脉冲时滞差分方程的同样性质的一般性脉冲条件。     

Oscillation of delay difference equations with several delays

In this paper, we obtain some new oscillation criteria for the difference equation with several delays

     

Oscillation of partial difference equations with continuous variables

In this paper, we consider the partial difference equation with continuous variables of the form P₁z(x + a, y + b) + p₂z (x + a, y) + p₃z (x, y + b) − p₄z (x, y) + P (x, y) z (x − τ, y − σ) = 0, where P ϵ C(R⁺ × R⁺, R⁺ − {0}), a, b, τ, σ are real numbers and p_i (i = 1, 2, 3, 4) are nonnegative constants. Some sufficient conditions for all solutions of this equation to be oscillatory are obtained.     

A remark on “Oscillation of nonlinear partial difference systems”

In this remark, we shall show that the main results of the paper “Oscillation of nonlinear partial difference systems” (J. Math. Anal. Appl. 277 (2003) 689-700) are wrong.     

Oscillation of solutions for certain impulsive vector parabolic differential equations with delays

In this paper, sufficient conditions are established for H-oscillation of solutions of the following impulsive vector parabolic differential equations with delays

     

Oscillation criteria for first-order neutral nonlinear difference equations with variable coefficients

Consider the first-order neutral nonlinear difference equation of the form

, where τ > 0, σ_i ≥ 0 (i = 1, 2,…, m) are integers, {p_n} and {q_n} are nonnegative sequences. We obtain new criteria for the oscillation of the above equation without the restrictions Σ_n=0^∞ q_n = ∞ or Σ_n=0^∞ nq_n Σ_j=n^∞ q_j = ∞ commonly used in the literature.     

A note on oscillation of second-order nonlinear difference equation with continuous variable

In this paper, by improving the proofs of some theorems in J. Math. Anal. Appl. 255 (2001) 349-357, we obtain some new oscillation criteria for the second-order nonlinear difference equation with continuous variable.     

具有连续变量的偏差分方程的振动准则

本文研究具有连续变量的偏差分方程Ａ（ｘ＋ａ,ｙ）＋Ａ（ｘ,ｙ＋ａ）－Ａ（ｘ,ｙ）＋Ｐ（ｘ,ｙ）Ａ（ｘ－ｒ,ｙ－）＝０,其中Ｐ　Ｃ（Ｒ＋ＸＲ＋,Ｒ＋＼｛０｝）,ａ,ｒ,都是正数。我们得到保证这个方程的所有解都具有振动性质的若干充分条件。     

Oscillation properties of nonlinear impulsive delay differential equations and applications to population models

Comparison theorem and explicit sufficient conditions are obtained for oscillation and nonoscillation of solutions of nonlinear impulsive delay differential equations which can be utilized to population dynamic models. Our results in this paper generalize and improve several known results.     

Unsaturated solutions for partial difference equations with forcing terms

The concept of unsaturated infinite double sequence is introduced by making use of frequency measures. Unsaturated solutions are then studied for a partial difference equation. Conditions for all solutions to be unsaturated are obtained. Since unsaturated solutions are oscillatory, our results yield oscillation criteria.     

具有变系数的偶数阶中立型差分方程的振动性

考虑了一类具有变系数的偶数阶中立型差分方程的振动性,通过建立一个比较定理,获得一些一类具有变系数的偶数阶中立型差分方程的振动性的充分条件.