New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays

Abstract The distance between consecutive zeros of a first-order differential equation with several variable delays is studied. Here, we show that the distribution of zeros of differential equations with variable delays is not an easy extension of the case of constant delays. We obtain new upper bou...

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Main Authors: Emad R. Attia, Bassant M. El-Matary
Format: Article
Language:English
Published: SpringerOpen 2023-08-01
Series:Journal of Inequalities and Applications
Subjects:
Online Access:https://doi.org/10.1186/s13660-023-03017-w
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author Emad R. Attia
Bassant M. El-Matary
author_facet Emad R. Attia
Bassant M. El-Matary
author_sort Emad R. Attia
collection DOAJ
description Abstract The distance between consecutive zeros of a first-order differential equation with several variable delays is studied. Here, we show that the distribution of zeros of differential equations with variable delays is not an easy extension of the case of constant delays. We obtain new upper bounds for the distance between zeros of all solutions of a differential equation with several delays, which extend and improve some existing results. Two illustrative examples are given to show the advantages of the proposed results over the known ones.
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spelling doaj.art-da60be8d6e434aa992009f2d02f4971e2023-11-20T11:16:19ZengSpringerOpenJournal of Inequalities and Applications1029-242X2023-08-012023111210.1186/s13660-023-03017-wNew results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delaysEmad R. Attia0Bassant M. El-Matary1Department of Mathematics, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz UniversityDepartment of Mathematics, College of Science and Arts, Al-Badaya, Qassim UniversityAbstract The distance between consecutive zeros of a first-order differential equation with several variable delays is studied. Here, we show that the distribution of zeros of differential equations with variable delays is not an easy extension of the case of constant delays. We obtain new upper bounds for the distance between zeros of all solutions of a differential equation with several delays, which extend and improve some existing results. Two illustrative examples are given to show the advantages of the proposed results over the known ones.https://doi.org/10.1186/s13660-023-03017-wDifferential equationsVariable delaysDistance between zerosOscillation
spellingShingle Emad R. Attia
Bassant M. El-Matary
New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
Journal of Inequalities and Applications
Differential equations
Variable delays
Distance between zeros
Oscillation
title New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
title_full New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
title_fullStr New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
title_full_unstemmed New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
title_short New results for the upper bounds of the distance between adjacent zeros of first-order differential equations with several variable delays
title_sort new results for the upper bounds of the distance between adjacent zeros of first order differential equations with several variable delays
topic Differential equations
Variable delays
Distance between zeros
Oscillation
url https://doi.org/10.1186/s13660-023-03017-w
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AT bassantmelmatary newresultsfortheupperboundsofthedistancebetweenadjacentzerosoffirstorderdifferentialequationswithseveralvariabledelays