الفهرس | Only 14 pages are availabe for public view |
Abstract The objective of this thesis is to study the uniform stability of zero solution, the uniform boundedness and uniform ultimate boundedness of all solutions of nonlinear delay differential equation of third-order, the uniform stability of zero solution of fourth-order nonlinear non-autonomous delay differential equation and investigate sufficient conditions for the existence of positive periodic solutions of fourth-order nonlinear delay differential equation with deviating argument. |