Oscillation of even order linear functional differential equations with deviating arguments of mixed type
Oscillation of even order linear functional differential equations with deviating arguments of mixed type
复制标题
混合型偏差变元偶次线性泛函微分方程的振动
DOI:
10.1016/0022-247x(84)90253-1
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发表时间:
1984
期刊:
影响因子:
--
通讯作者:
T. Kusano
中科院分区:
文献类型:
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作者:
T. Kusano
where n is even, p:[0, co)+ R and g:[O, 00)+ R are continuous, p (t)> 0, g (t) is nondecreasing and Cm,,, g (t)= 03. By a proper solution of Eq.(1) we mean a function x:[TX, 00)-+ R which satisfies (1) for all sufficiently large t and sup {lx (t) J: t> T)> 0 for any T> TX. We make the standing hypothesis that (1) does possess proper solutions. A proper solution is called oscillatory if it has arbitrarily large zeros; otherwise it is called nonoscillatory. If x (t) is a nonoscillatory solution of (l), then there exist an even integer 1 E (0, 2,..., n} and at,> TX such that