ON THE EXISTENCE OF PERIODIC SOLUTIONS FOR NONLINEAR SYSTEM WITH MULTIPLE DELAYS

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ON THE EXISTENCE OF PERIODIC SOLUTIONS FOR NONLINEAR SYSTEM WITH MULTIPLE DELAYS

The existence of T-periodic solutions of the nonlinear system with multiple delaysis studied. By using the topological degree method, sufficient conditions are obtained forthe existence of T-periodic solutions. As an application, the existence of positive periodicsolution for a logarithmic population model is established under some conditions.

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作 者: 曹显兵  
作者单位:Basic Sciences Department, Beijing Technology and Business University, Beijing 100037, China 
刊 名:应用数学和力学(英文版)  EI SCI
英文刊名:APPLIED MATHEMATICS AND MECHANICS(ENGLISH EDITION) 
年,卷(期):2003 24(1) 
分类号:O175.12 
关键词:multiple delays   periodic solution   topological degree  
机标关键词:MULTIPLE DELAYSNONLINEAR SYSTEMpopulation modelnonlinear systemdegree method 
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