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Oscillation of first-order differential equations with several non-monotone retarded arguments

Oscillation of first-order differential equations with several non-monotone retarded arguments AbstractConsider the first-order linear differential equation with several non-monotone retarded arguments x′⁢(t)+∑i=1mpi⁢(t)⁢x⁢(τi⁢(t))=0{x^{\prime}(t)+\sum_{i=1}^{m}p_{i}(t)x(\tau_{i}(t))=0}, t≥t0{t\geq t_{0}}, where the functions pi,τi∈C⁢([t0,∞),ℝ+){p_{i},\tau_{i}\in C([t_{0},\infty),\mathbb{R}^{+})}, for every i=1,2,…,m{i=1,2,\ldots,m}, τi⁢(t)≤t{\tau_{i}(t)\leq t}for t≥t0{t\geq t_{0}}and limt→∞⁡τi⁢(t)=∞{\lim_{t\to\infty}\tau_{i}(t)=\infty}.New oscillation criteria which essentially improve the known results in the literature are established.An example illustrating the results is given. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Georgian Mathematical Journal de Gruyter

Oscillation of first-order differential equations with several non-monotone retarded arguments

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References (44)

Publisher
de Gruyter
Copyright
© 2020 Walter de Gruyter GmbH, Berlin/Boston
ISSN
1572-9176
eISSN
1572-9176
DOI
10.1515/gmj-2019-2055
Publisher site
See Article on Publisher Site

Abstract

AbstractConsider the first-order linear differential equation with several non-monotone retarded arguments x′⁢(t)+∑i=1mpi⁢(t)⁢x⁢(τi⁢(t))=0{x^{\prime}(t)+\sum_{i=1}^{m}p_{i}(t)x(\tau_{i}(t))=0}, t≥t0{t\geq t_{0}}, where the functions pi,τi∈C⁢([t0,∞),ℝ+){p_{i},\tau_{i}\in C([t_{0},\infty),\mathbb{R}^{+})}, for every i=1,2,…,m{i=1,2,\ldots,m}, τi⁢(t)≤t{\tau_{i}(t)\leq t}for t≥t0{t\geq t_{0}}and limt→∞⁡τi⁢(t)=∞{\lim_{t\to\infty}\tau_{i}(t)=\infty}.New oscillation criteria which essentially improve the known results in the literature are established.An example illustrating the results is given.

Journal

Georgian Mathematical Journalde Gruyter

Published: Sep 1, 2020

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