Periodic solutions to second order nonautonomous differential systems with unbounded nonlinearities |
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| Authors: | Zhiqing Han |
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| Institution: | Department of Applied Mathematics, Dalian University of Technology, Dalian 116023, Liaoning, P. R. China |
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| Abstract: | We investigate the existence of periodic solutions of differential systems with a skew‐symmetric matrix term and unbounded nonlinearities. Under new generalized Ahmad‐Lazer‐Paul conditions, some existence results are obtained and some results in the literature are improved. |
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| Keywords: | Second order system Ahmad‐Lazer‐Paul type condition saddle point theorem MSC (2010) 58F22 |
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