Chengyue Li, Changhua Shi
Abstract:
By means of the Schechter's Linking method, we study the
existence of 2T-periodic solutions of the non-autonomous
fourth-order ordinary differential equation
where
,
,
is 2T-periodic in t and satisfies either
with
,
or
with
.
Submitted June 18, 2009. Published September 27, 2009.
Math Subject Classifications: 58E05, 34C37, 70H05.
Key Words: Periodic solutions; fourth-order differential equations;
linking theorem; critical points.
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Chengyue Li Department of Mathematics, Minzu University of China Beijing 100081, China. email: cunlcy@163.com | |
Changhua Shi Department of Mathematics, Minzu University of China Beijing 100081, China. email: shichanghua88888@163.com |
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