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Neutral delay differential equations: An improved approach and its applications in the oscillation theory
  • Osama Moaaz,
  • George Chatzarakis,
  • Ali Muhib
Osama Moaaz
Mansoura University Faculty of Science
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George Chatzarakis
School of Pedagogical and Technological Education
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Ali Muhib
Ibb University
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Abstract

The objective of this study is to establish new sufficient criteria for the oscillation of the 2nd-order neutral equation $\left( r\left( z^{\prime }\right) ^{\alpha }\right) ^{\prime }\left( t\right) +q\left( t\right) x^{\beta }\left( \sigma \left( t\right) \right) =0,$ where $t\geq t_{0}$ and $z\left( t\right) =x\left( t\right) +px\left( \tau \left( t\right) \right) $%. We improve the known criteria by establishing a new relationship between the solution $x$ and the corresponding function $z$. To show the importance of our results, we provide two examples.