EXISTENCE OF POSITIVE SOLUTIONS OF SECOND-ORDER NONLINEAR NEUTRAL DIFFERENTIAL EQUATIONS WITH POSITIVE AND NEGATIVE TERMS

  • Zhang, Zhenguo (College of Mathematics and Information of Science, Hebei Normal University) ;
  • Yang, Aijun (College of Mathematics and Information of Science, Hebei Normal University) ;
  • Di, Congna (College of Mathematics and Information of Science, Hebei Normal University)
  • Published : 2007.09.30

Abstract

In this paper, the existence of bounded positive solution of the second-order nonlinear neutral differential equations are studied. Some new sufficient conditions are given. Furthermore, examples given show that the results here are almost sharp.

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