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Keywords:
oscillation; third order; functional differential equation
oscillation; third order; functional differential equation
Summary:
In this paper we are concerned with the oscillation of third order nonlinear delay differential equations of the form
\[ \ \left( r_{2}\left( t\right) \left( r_{1}\left( t\right) x^{\prime }\right) ^{\prime }\right) ^{\prime }+p\left( t\right) x^{\prime }+q\left( t\right) f\left( x\left( g\left( t\right) \right) \right) =0. \]
We establish some new sufficient conditions which insure that every solution of this equation either oscillates or converges to zero.
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