POSITIVE PERIODIC SOLUTIONS FOR NONAUTONOMOUS IMPULSIVE NEUTRAL FUNCTIONAL DIFFERENTIAL SYSTEMS WITH TIME-VARYING DELAYS ON TIME SCALES

Jinchun Dai, Yongkun Li, Tianwei Zhang
2010 Electronic Journal of Differential Equations   unpublished
Using a fixed point theorem of strict-set-contraction, we prove the existence of positive periodic solutions for a class of nonautonomous impulsive neutral functional differential system with time-varying delays on time scales.
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