Nonlinear oscillations of second order differential equations of Euler type |
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Authors: | Jitsuro Sugie Tadayuki Hara |
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Institution: | Department of Mathematics, Faculty of Science, Shinshu University, Matsumoto 390, Japan ; Department of Mathematical Sciences, University of Osaka Prefecture, Sakai 593, Japan |
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Abstract: | We consider the nonlinear equation , where satisfies for , but is not assumed to be sublinear or superlinear. We discuss whether all nontrivial solutions of the equation are oscillatory or nonoscillatory. Our results can be applied even to the case , which is most difficult. |
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Keywords: | Oscillation nonlinear differential equations Li\'{e}nard system global phase portrait |
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