الفهرس 
General ConceptsOnly 14 pages are availabe for public view
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Abstract
we obtained some sufficient conditions for the oscillation of the first order linear neutral delay differential equation with positive and negative coefficients.
We showed the oscillation criteria and the existence results of non-oscillatory solutions of various linear and nonlinear differential equations have been studied extensively
In this theses we present the oscillation behaviour of the solutions of the second order neutral differential equation in the form
where , are non-negative constants , and , .
and we discussed some results for the existence of non-oscillatory solutions of the forced non-linear equation.
where , are positive constants, , , , , , and .
The results concerning this equation are prepared in an article and will submitted for publication.