Existence of Positive Solutions of Nonlinear NeutralEquations with Positive and Negative Coefficients

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摘要 A class of nonlinear neutral equations with positive and negative coefficients is considered. Seveal conditions for existence of eventually positive solutions are obtained,and they extend and improve some of the criteria existing in literature. Our conditions are necessary and suffcient when all the coeffcients of the equations are constants. A class of nonlinear neutral equations with positive and negative coefficients is considered. Seveal conditions for existence of eventually positive solutions are obtained,and they extend and improve some of the criteria existing in literature. Our conditions are necessary and suffcient when all the coeffcients of the equations are constants.

作者关新平段广仁张友安杨军

出处《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1998年第2期32-35,共4页 哈尔滨工业大学学报（英文版）

关键词 NONLINEAR NEUTRAL EQUATIONS OSCILLATION EXISTENCE POSITIVE solutions Nonlinear neutral equations, oscillation, existence, positive solutions

分类号 TB12 [理学—工程力学]

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Journal of Harbin Institute of Technology(New Series)

1998年第2期

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Existence of Positive Solutions of Nonlinear NeutralEquations with Positive and Negative Coefficients

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