Comment on the paper: “Forced oscillation of certain neutral hyperbolic equations with continuous distributed deviating arguments” [Math. Comput. Modeling 49 (2009) 1211–1220] |
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Authors: | Nina Shang Huizeng Qin |
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Affiliation: | aSchool of Science, Shandong University of Technology, Zibo, Shandong, 255049, China |
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Abstract: | In recent years, many results on oscillation criteria of second-order nonlinear neutral delay differential equations with distributed deviating argument have been obtained, but some of these criteria are incorrect due to a mistake in a crucial auxiliary result. We give two counterexamples. |
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Keywords: | Differential equations Oscillatory solution Deviating arguments |
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