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Existence of subharmonic periodic solutions to a class of second-ordernonlinear non-autonomous mixed-type functional differentialequations
Shu Xiaobao
Department of Mathematics, HuNan University
*Correspondence author
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Funding: Research was partially supported by the NNSF of China（No.10771055）, the Doctoral Fund of Ministry of Education of China（No.200805321017 ）
Opened online: 1 September 2011
Accepted by: none
Citation: Shu Xiaobao.Existence of subharmonic periodic solutions to a class of second-ordernonlinear non-autonomous mixed-type functional differentialequations[OL]. [ 1 September 2011] http://en.paper.edu.cn/en_releasepaper/content/4440753
 
 
In this paper, by introducingsubdifferentiability of lower semicontinuous convex functions and the conjugate functions, as well as critical point theory and operator equations theory, we obtain multiple subharmonic periodic solutions to a class of second-order nonlinear non-autonomous mixed-type nonlinear functional differential equations.
Keywords:variational structure; critical points; operator equations; subdifferentiability; subharmonic periodic solutions; second-order mixed-type nonlinearfunctional differential equations
 
 
 

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