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中立型二阶非线性微分方程振动性的判据 总被引:7,自引:0,他引:7
Abstract. In this paper ,the oscillation criteria for the solutions of the nonlinear differential e-quations of neutral type of the forms: 相似文献
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The existence of positive periodic solutions for a periodic Volterra equation with several finite delays and an infinite delay is established. Sufficient conditions for the periodic solutions having global attractivity are obtained. 相似文献
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具有多个时滞的周期Lotka-Volterra系统(英文) 总被引:1,自引:0,他引:1
1 IntroductionThe LotkaVOlterra system is a rudimentary model on mathematical ecologyand has been studied extensively; one can see that the two--species predator-prey nonautonomous LotkaVolterra system and the two-predator and one-prey periodic Lotka-VOlterra system have been investigated, respectively, in[21 and [31. Some sufficient conditions are obtained for the (unifOrm) persi-stence, existence and uniqueness, and asymptotic stability of periodic solu-tions. Furthermore, the similar re… 相似文献
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A general periodic Lotka-Volterra difference system is studied in this paper. A set of easily verifiable sufficient conditions that guarantee the existence of the positive periodic solutions is obtained. 相似文献
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本文研究具有Robin边界条件的二阶奇异泛函微分方程组A(t,x,x)x=f(t,xt,xt)的两点边值问题,给出该两点边值问题的两个解的先验估计定理和一个解的存在定理. 相似文献
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研究了一类具有时滞和脉冲的Lotka-Volterra竞争系统,利用迭合度理论建立了该系统正周期解存在的充分条件. 相似文献
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