http://hdl.handle.net/20.500.12128/14874
Tytuł: | Remarks on the stability of some quadratic functional equations |
Autor: | Kominek, Zygfryd |
Słowa kluczowe: | quadratic functional equations; stability |
Data wydania: | 2008 |
Źródło: | "Rocznik Akademii Górniczo-Hutniczej im. Stanisława Staszica, Opuscula Mathematica" Vol. 28, no. 4 (2008), s. 517-527 |
Abstrakt: | Stability problems concerning the functional equations of the form f(2x + y) = 4f(x) + f(y) + f(x + y) − f(x − y), and f(2x + y) + f(2x − y) = 8f(x) + 2f(y) are investigated. We prove that if the norm of the difference between the LHS and the RHS of one of equations (1) or (2), calculated for a function g is say, dominated by a function ' in two variables having some standard properties then there exists a unique solution f of this equation and the norm of the difference between g and f is controlled by a function depending on '. |
URI: | http://hdl.handle.net/20.500.12128/14874 |
ISSN: | 2300-6919 1232-9274 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Kominek_Remarks_on_the_stability_of_some_quadratic.pdf | 441,12 kB | Adobe PDF | Przejrzyj / Otwórz |
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