Positive periodic solutions in neutral nonlinear differential equations

Youssef Raffoul
2007 Electronic Journal of Qualitative Theory of Differential Equations  
We use Krasnoselskii's fixed point theorem to show that the nonlinear neutral differential equation with delay has a positive periodic solution. An example will be provided as an application to our theorems.
doi:10.14232/ejqtde.2007.1.16 fatcat:xbksg75se5h4npt5vvtf5dt2d4