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Erschienen in: Journal of Inequalities and Applications 1/2006

Open Access 01.12.2006 | Research Article

Generalized orthogonal stability of some functional equations

verfasst von: Justyna Sikorska

Erschienen in: Journal of Inequalities and Applications | Ausgabe 1/2006

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Abstract

We deal with a conditional functional inequality https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq1_HTML.gif , where https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq2_HTML.gif is a given orthogonality relation, https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq3_HTML.gif is a given nonnegative number, and https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq4_HTML.gif is a given real number. Under suitable assumptions, we prove that any solution https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq5_HTML.gif of the above inequality has to be uniformly close to an orthogonally additive mapping https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq6_HTML.gif , that is, satisfying the condition https://static-content.springer.com/image/art%3A10.1155%2FJIA%2F2006%2F12404/MediaObjects/13660_2005_Article_1566_IEq7_HTML.gif . In the sequel, we deal with some other functional inequalities and we also present some applications and generalizations of the first result.

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Metadaten
Titel
Generalized orthogonal stability of some functional equations
verfasst von
Justyna Sikorska
Publikationsdatum
01.12.2006
Verlag
Springer International Publishing
Erschienen in
Journal of Inequalities and Applications / Ausgabe 1/2006
Elektronische ISSN: 1029-242X
DOI
https://doi.org/10.1155/JIA/2006/12404

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