%0 Journal Article %A Xiguang Li %D 2011 %J International Journal of Mathematical and Computational Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 56, 2011 %T Existence of Solution for Boundary Value Problems of Differential Equations with Delay %U https://publications.waset.org/pdf/7420 %V 56 %X In this paper , by using fixed point theorem , upper and lower solution-s method and monotone iterative technique , we prove the existence of maximum and minimum solutions of differential equations with delay , which improved and generalize the result of related paper. %P 1426 - 1428