Functional Differential Equations with Several Delays: Oscillatory Behavior

In this work, we study the asymptotic behavior of even-order delay functional differential equation. As an extension of the recent development in the study of oscillation, we obtain improved and simplified criteria that test the oscillation of solutions of the studied equation. We adopt an approach...

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Main Authors: Barakah Almarri, Ali Muhib, Clemente Cesarano, Osama Moaaz, Mona Anis
Format: Article
Language:English
Published: MDPI AG 2022-07-01
Series:Symmetry
Subjects:
Online Access:https://www.mdpi.com/2073-8994/14/8/1570
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author Barakah Almarri
Ali Muhib
Clemente Cesarano
Osama Moaaz
Mona Anis
author_facet Barakah Almarri
Ali Muhib
Clemente Cesarano
Osama Moaaz
Mona Anis
author_sort Barakah Almarri
collection DOAJ
description In this work, we study the asymptotic behavior of even-order delay functional differential equation. As an extension of the recent development in the study of oscillation, we obtain improved and simplified criteria that test the oscillation of solutions of the studied equation. We adopt an approach that improves the relationships between the solution with and without delay. The symmetry between the positive and negative solutions also plays a key role in simplifying the presentation of the main results. Finally, we attach an example to illustrate the results and compare them together with the previous results in the literature.
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spelling doaj.art-e5eb5054517a47c5b600777a9ba0ea682023-11-30T22:33:12ZengMDPI AGSymmetry2073-89942022-07-01148157010.3390/sym14081570Functional Differential Equations with Several Delays: Oscillatory BehaviorBarakah Almarri0Ali Muhib1Clemente Cesarano2Osama Moaaz3Mona Anis4Department of Mathematical Sciences, College of Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi ArabiaDepartment of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, EgyptSection of Mathematics, International Telematic University Uninettuno, CorsoVittorio Emanuele II, 39, 00186 Rome, ItalyDepartment of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, EgyptDepartment of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, EgyptIn this work, we study the asymptotic behavior of even-order delay functional differential equation. As an extension of the recent development in the study of oscillation, we obtain improved and simplified criteria that test the oscillation of solutions of the studied equation. We adopt an approach that improves the relationships between the solution with and without delay. The symmetry between the positive and negative solutions also plays a key role in simplifying the presentation of the main results. Finally, we attach an example to illustrate the results and compare them together with the previous results in the literature.https://www.mdpi.com/2073-8994/14/8/1570delay differential equationeven ordersufficient conditionsnoncanonical case
spellingShingle Barakah Almarri
Ali Muhib
Clemente Cesarano
Osama Moaaz
Mona Anis
Functional Differential Equations with Several Delays: Oscillatory Behavior
Symmetry
delay differential equation
even order
sufficient conditions
noncanonical case
title Functional Differential Equations with Several Delays: Oscillatory Behavior
title_full Functional Differential Equations with Several Delays: Oscillatory Behavior
title_fullStr Functional Differential Equations with Several Delays: Oscillatory Behavior
title_full_unstemmed Functional Differential Equations with Several Delays: Oscillatory Behavior
title_short Functional Differential Equations with Several Delays: Oscillatory Behavior
title_sort functional differential equations with several delays oscillatory behavior
topic delay differential equation
even order
sufficient conditions
noncanonical case
url https://www.mdpi.com/2073-8994/14/8/1570
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AT clementecesarano functionaldifferentialequationswithseveraldelaysoscillatorybehavior
AT osamamoaaz functionaldifferentialequationswithseveraldelaysoscillatorybehavior
AT monaanis functionaldifferentialequationswithseveraldelaysoscillatorybehavior