On higher order generalized Emden-Fowler differential equations with delay argument

In the paper the differential equation u⁽ⁿ⁾ (t) + p(t)|u(τ (t))|^(µ(t)) sign u(τ (t)) = 0, is considered. Here, we assume that n ≥ 3, p ∈ Lloc(R₊; R₋), µ ∈ C(R₊; (0, +∞)), τ ∈ C(R₊; R₊), τ (t) ≤ t for t ∈ R₊ and limt→+∞ τ (t) = +∞. In case µ(t) ≡ const > 0, oscillatory properties of equation have...

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Published in:Нелінійні коливання
Date:2015
Main Authors: Domoshnitsky, A., Koplatadze, R.
Format: Article
Language:English
Published: Інститут математики НАН України 2015
Online Access:https://nasplib.isofts.kiev.ua/handle/123456789/177230
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Journal Title:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this:On higher order generalized Emden-Fowler differential equations with delay argument / A. Domoshnitsky, R. Koplatadze // Нелінійні коливання. — 2015. — Т. 18, № 4. — С. 507-526 — Бібліогр.: 15 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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Summary:In the paper the differential equation u⁽ⁿ⁾ (t) + p(t)|u(τ (t))|^(µ(t)) sign u(τ (t)) = 0, is considered. Here, we assume that n ≥ 3, p ∈ Lloc(R₊; R₋), µ ∈ C(R₊; (0, +∞)), τ ∈ C(R₊; R₊), τ (t) ≤ t for t ∈ R₊ and limt→+∞ τ (t) = +∞. In case µ(t) ≡ const > 0, oscillatory properties of equation have been extensively studied, where as if µ(t) ≢ const, to the extent of authors’ knowledge, the analogous questions have not been examined. In this paper, new sufficient conditions for the equation (∗) to have Property B are established. Розглянуто диференцiальне рiвняння u⁽ⁿ⁾ (t) + p(t)|u(τ (t))|^(µ(t)) sign u(τ (t)) = 0 (∗) де n ≥ 3, p ∈ Lloc(R₊; R₋), µ ∈ C(R₊; (0, +∞)), τ ∈ C(R₊; R₊), τ (t) ≤ t для t ∈ R₊ та limt→+∞ τ (t) = +∞. У випадку µ(t) ≡ const > 0 осциляцiйнi властивостi рiвняння (∗) було детально вивчено, тодi як у випадку µ(t) ≢ const, наскiльки вiдомо авторам, подiбнi питання не було розглянуто. У статтi наведено новi достатнi умови для того, щоб рiвняння (∗) мало властивiсть B.
ISSN:1562-3076