Periodic solutions of periodically perturbed functional differential equations  

作　　者：Shiwang Ma Zhicheng Wang Jianshe Yu 

机构地区：[1]Huazhong Univ Sci & Technol, Dept Automat Control, Wuhan 430074, Peoples R China [2]Hunan Univ, Dept Math Appl, Changsha 410082, Peoples R China

出　　处：《Chinese Science Bulletin》1998年第23期1956-1959,共4页

基　　金：ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .193310 6 1)

摘　　要：By using the generalized degree theory, some periodically perturbed functional differential equations have been proved to have at least one periodic solution if the associated homogeneous linear equations have no nontrivial periodic solution. Some known results are generalized.By using the generalized degree theory, some periodically perturbed functional differential equations have been proved to have at least one periodic solution if the associated homogeneous linear equations have no nontrivial periodic solution. Some known results are generalized.

关 键 词：generalized degree theory FUNCTIONAL differential equation mixed type INFINITE delay periodic solution. 

分 类 号：O175[理学—数学]