On the mild solutions of higher-order differential equations in Banach spaces

For the higher-order abstract differential equation u(n)(t)=Au(t)+f(t), t∈ℝ, we give a new definition of mild solutions. We then characterize the regular admissibility of a translation-invariant subspace ℳ of BUC(ℝ,E) with respect to the above-mentioned equation in terms of solvability of the opera...

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Main Author: Nguyen Thanh Lan
Format: Article
Language:English
Published: Wiley 2003-01-01
Series:Abstract and Applied Analysis
Online Access:http://dx.doi.org/10.1155/S1085337503303057
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author Nguyen Thanh Lan
author_facet Nguyen Thanh Lan
author_sort Nguyen Thanh Lan
collection DOAJ
description For the higher-order abstract differential equation u(n)(t)=Au(t)+f(t), t∈ℝ, we give a new definition of mild solutions. We then characterize the regular admissibility of a translation-invariant subspace ℳ of BUC(ℝ,E) with respect to the above-mentioned equation in terms of solvability of the operator equation AX−X𝒟n=C. As applications, periodicity and almost periodicity of mild solutions are also proved.
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issn 1085-3375
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series Abstract and Applied Analysis
spelling doaj-art-010ce6e092d8422ebde7a6511acc2ed02025-02-03T06:42:17ZengWileyAbstract and Applied Analysis1085-33751687-04092003-01-0120031586588010.1155/S1085337503303057On the mild solutions of higher-order differential equations in Banach spacesNguyen Thanh Lan0Department of Mathematics, Western Kentucky University, Bowling Green 42101, KY, USAFor the higher-order abstract differential equation u(n)(t)=Au(t)+f(t), t∈ℝ, we give a new definition of mild solutions. We then characterize the regular admissibility of a translation-invariant subspace ℳ of BUC(ℝ,E) with respect to the above-mentioned equation in terms of solvability of the operator equation AX−X𝒟n=C. As applications, periodicity and almost periodicity of mild solutions are also proved.http://dx.doi.org/10.1155/S1085337503303057
spellingShingle Nguyen Thanh Lan
On the mild solutions of higher-order differential equations in Banach spaces
Abstract and Applied Analysis
title On the mild solutions of higher-order differential equations in Banach spaces
title_full On the mild solutions of higher-order differential equations in Banach spaces
title_fullStr On the mild solutions of higher-order differential equations in Banach spaces
title_full_unstemmed On the mild solutions of higher-order differential equations in Banach spaces
title_short On the mild solutions of higher-order differential equations in Banach spaces
title_sort on the mild solutions of higher order differential equations in banach spaces
url http://dx.doi.org/10.1155/S1085337503303057
work_keys_str_mv AT nguyenthanhlan onthemildsolutionsofhigherorderdifferentialequationsinbanachspaces