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| Existence of Single and Multiple PositivePeriodic Solutions for a Kindof Delay Logistic Equations | |
| 作者姓名： | 王国明 黄庆道 韩月才 李勇 |
| 作者单位： | School of Mathematics，Jilin University，Changchun，130012，School of Mathematics，Jilin University，Changchun，130012，School of Mathematics，Jilin University，Changchun，130012，Communicated |
| 摘 要： | W匕eonsider the existenee of single and multiple positive periodie solutions for the generalperiodie Logistie equation ,‘(t)=夕(t)!a(t)一f(t,夕(t一几(t)),…,夕(t一几,(t)))],t‘R,(E)wheref:Rx皿+’‘什矿15 eontinuous,a(t)〔C(皿,R+),瑞(亡)〔C(R,R),anda(t)=a(t+T),几二(t)=爪(t+T),饥=1,…,,z,f(t,。1,。2,…,。,,)=f(亡+T,。,,。2,…,。。),T>O· It 15 well known that many matliematieal eeologieal Logistie equations are related to tl、eequation(E),e.g.,(1)the single speeies periodie populatio,i ,,… |
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