Existence and multiplicity of positive periodic solutions to functional differential equations with impulse effects |
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| Affiliation: | 1. School of Mathematics and Statistics, Northeast Normal University, Changchun 130024, PR China;2. School of Business, Northeast Normal University, Changchun 130024, PR China;3. Applied Science College, Changchun University, Changchun 130022, PR China |
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| Abstract: | This paper deals with a new existence theory for single and multiple positive periodic solutions to a kind of nonautonomous functional differential equations with impulse actions at fixed moments by employing a fixed point theorem in cones. Easily verifiable sufficient criteria are established. The paper extends some previous results and reports some new results about impulsive functional differential equations. |
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