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一阶周期系统正解的存在性
引用本文:景兰,路艳琼.一阶周期系统正解的存在性[J].烟台大学学报(自然科学与工程版),2013,26(4):246-249.
作者姓名:景兰  路艳琼
作者单位:1. 西北师范大学数学与统计学院,甘肃兰州730070;兰州职业技术学院教务处,甘肃兰州730070
2. 西北师范大学数学与统计学院,甘肃兰州,730070
基金项目:国家自然科学基金资助项目
摘    要:运用不动点指数理论研究了一阶周期系统x’i(t)+f i(t,x(t))=0,i=1,2,…,n正解的存在性,其中x=(x1,…,x n)∈Rn,f i∈C(×n,)(=(-∞,+∞))且满足f i(t,·)=f i(t+ω,·),i=1,…,n,建立了上述系统正解的若干存在性结果.

关 键 词:一阶周期系统  正解  不动点指数  存在性

Existence of Positive Solutions of First-order Periodic Systems
JING Lan , LU Yan-qiong.Existence of Positive Solutions of First-order Periodic Systems[J].Journal of Yantai University(Natural Science and Engineering edirion),2013,26(4):246-249.
Authors:JING Lan  LU Yan-qiong
Institution:JING Lan1'2 LU , Yan-qlong (1. College of Mathematics and Statistics Northwest Normal University, Lanzhou 730070, China; 2. Lanzhou Academic Affairs Office, Lanzhou Vocational Technical College, Lanzhou 730070, China)
Abstract:Using the fixed point index theory, we study the existence of positive periodic solutions of first-order pe- riodic systems x. (t) +fi ( t,x (t) ) = 0, i = 1,2,…, n, where x = ( x, ,..., x, ) ∈ R^n ,fi ∈ C ( R x R^n, R ) with fi( t, · ) =fi ( t + ω ), i = 1,..., n. Some existence results of the positive periodic solutions for first-order periodic sys- tems are established.
Keywords:first-order periodic systems  positive solutions  fixed point index  existence
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