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Oscillation of 2nd-order Nonlinear Noncanonical Difference Equations with Deviating Argument
  
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KeyWord:Nonlinear difference equation  Retarded  Advanced  Noncanonical  Oscillation
Author NameAffiliation
George E. Chatzarakis Department of Electrical and Electronic Engineering Educators, School of Pedagogical and Technological Education (ASPETE), Marousi 15122, Athens, Greece 
Said R. Grace Department of Engineering Mathematics, Faculty of Engineering, Cairo 
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Abstract:
      The purpose of this paper is to establish some new criteria for the oscillation of the second-order nonlinear noncanonical difference equations of the form \[ \Delta \left( a\left( n\right) \Delta x\left( n\right) \right) +q(n)x^{\beta }\left( g(n)\right) =0,\text{ \ \ }n\geq n_{0} \] under the assumption \[ \sum_{s=n}^{\infty }\frac{1}{a\left( s\right) }<\infty \text{.} \] Corresponding difference equations of both retarded and advanced type are studied. A particular example of Euler type equation is provided in order to illustrate the significance of our main results.