منابع مشابه
Littlewood problem for a singular subquadratic potential ( Dedicated to Professor George R . Sell
We consider a periodically forced singular oscillator in which the potential has subquadratic growth at infinity and admits a singularity. Using Moser’s twist theorem of invariant curves, we show the existence of quasi-periodic solutions. This solves the Littlewood problem on the boundedness of all solutions for such a system.
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ژورنال
عنوان ژورنال: Journal of Dynamics and Differential Equations
سال: 2015
ISSN: 1040-7294,1572-9222
DOI: 10.1007/s10884-015-9464-8