By means of continuation theorem of coincidence degree theory, we study a kind of Lienard equation with a deviating argument as follows x" (t) + f (x (t)) x' (t) + g (x (t - tau (t, x (t)))) = e (t). Some new results on the existence of periodic solutions are obtained. (C) 2003 Elsevier Inc. All rights reserved.
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Jiaxing Univ, Coll Math & Informat Engn, Jiaxing 314001, Zhejiang, Peoples R ChinaHunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China
Shao, Jianying
Wang, Lijuan
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Jiaxing Univ, Coll Math & Informat Engn, Jiaxing 314001, Zhejiang, Peoples R ChinaHunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China
Wang, Lijuan
Yu, Yuehua
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Hunan Univ Arts & Sci, Dept Math, Changde 415000, Hunan, Peoples R ChinaHunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China
Yu, Yuehua
Zhou, Jinglei
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Hunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China
Hunan Univ Arts & Sci, Dept Math, Changde 415000, Hunan, Peoples R ChinaHunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China
机构:
Jiaxing Univ, Coll Math & Informat Sci, Jiaxing 314001, Zhejiang, Peoples R ChinaJiaxing Univ, Coll Math & Informat Sci, Jiaxing 314001, Zhejiang, Peoples R China
Liu, Bingwen
Huang, Lihong
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Hunan Univ, Coll Math & Econometr, Changsha 410082, Peoples R ChinaJiaxing Univ, Coll Math & Informat Sci, Jiaxing 314001, Zhejiang, Peoples R China
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Cent S Univ, Sch Mat Sci & Comp Technol, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Mat Sci & Comp Technol, Changsha 410083, Hunan, Peoples R China
Zhou, Yinggao
Tang, Xianhua
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Cent S Univ, Sch Mat Sci & Comp Technol, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Mat Sci & Comp Technol, Changsha 410083, Hunan, Peoples R China