

Author: Wu X-P. Mawhin C-L.J.
Publisher: Academic Press
ISSN: 0022-247X
Source: Journal of Mathematical Analysis and Applications, Vol.236, Iss.2, 1999-08, pp. : 227-235
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Abstract
Some existence theorems are obtained by the least action principle for periodic solutions of nonautonomous second-order systems with a potential which is the sum of a subconvex function and a subquadratic function.
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