%0 Journal Article
%T OSCILLATION PROPERTIES OF SOLUTIONS FORDIFFERENTIAL EQUATIONS WITHDIFFERENTIAL EQUATIONS WITHUNBOUNDED DELAYS<br>具有无界时滞的微分方程解的振动性
%A LIU ZHENG-RONG
%A Yu YUAN-HONG
%A <br>刘正荣
%J 系统科学与数学
%D 1994
%I 
%X In the present paper, we are interested in the oscillation properties for functionaldifferential equations of the' forms'i = 1andFirst we show that the result on (l) of Hunt and Yorke can be extended to differential equations with unbounded delays. Secondly, a necessary and sufficient conditionis obtained for the oscillation of all solutions of equation (2).
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=37F46C35E03B4B86&jid=0CD45CC5E994895A7F41A783D4235EC2&aid=5C286AEB3DCA56F2088C292AFF06B1C9&yid=3EBE383EEA0A6494&vid=F3583C8E78166B9E&iid=38B194292C032A66&sid=DC330B09A33F1455&eid=9F8C5EF901EA1E7E&journal_id=1000-0577&journal_name=系统科学与数学&referenced_num=3&reference_num=0