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On oscillatory fourth order nonlinear neutral differential equations – III

  • Arun Kumar Tripathy EMAIL logo and Rashmi Rekha Mohanta
Published/Copyright: November 20, 2018
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Abstract

In this paper, several sufficient conditions for oscillation of all solutions of fourth order functional differential equations of neutral type of the form

(r(t)(y(t)+p(t)y(tτ)))+q(t)G(y(tσ))=0

are studied under the assumption

0tr(t)dt=
MSC 2010: Primary 34C10; 34C15
  1. (Communicated by Michal Fečkan )

Acknowledgement

The authors are thankful to the referee for his/her helpful suggestions and necessary corrections in the completion of this paper.

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Received: 2017-07-27
Accepted: 2017-12-04
Published Online: 2018-11-20
Published in Print: 2018-12-19

© 2018 Mathematical Institute Slovak Academy of Sciences

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