Oscillation criteria of fourth-order nonlinear semi-noncanonical neutral differential equations via a canonical transform

Authors

  • Ganesh Purushothaman St. Joseph's College of Engineering, Chennai, India
  • Kannan Suresh St. Joseph's College of Engineering, Chennai, India
  • Ercan Tunc Tokat Gaziosmanpasa Univ., Tokat, Turkey
  • Ethiraju Thandapani Univ. of Madras, Chennai, India

DOI:

https://doi.org/10.58997/ejde.2023.70

Abstract

In this work first we transform the semi-noncanonical fourth order neutral delay differential equations into canonical type. This simplifies the investigations of finding the relationships between the solution and its companion function which plays an important role in the oscillation theory of neutral differential equations. Moreover, we improve these relationships based on the monotonic properties of positive solutions. We present new conditions for the oscillation of all solutions of the corresponding equation which improve the oscillation results already reported in the literature. Examples are provided to illustrate the importance of our main results.

For moreinformation see https://ejde.math.txstate.edu/Volumes/2023/70/abstr.html

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Published

2023-10-16

Issue

Vol. 2023 No. 01-87 (2023)

Section

Articles

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Copyright (c) 2023 Ganesh Purushothaman, Kannan Suresh, Ercan Tunc, Ethiraju Thandapani

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Oscillation criteria of fourth-order nonlinear semi-noncanonical neutral differential equations via a canonical transform. (2023). Electronic Journal of Differential Equations, 2023(01-87). https://doi.org/10.58997/ejde.2023.70