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Ulam stability of a generalized harmonic functional equation using Brzdek's fixed point technique

Authors
Sayyari, YaminDehghanian, MehdiWang, YongqiaoPark, Choonkil
Issue Date
Apr-2026
Publisher
SPRINGERNATURE
Keywords
Brzdek fixed point theorem; (Jensen) Harmonic functional equation; Stability
Citation
JOURNAL OF ANALYSIS, v.34, no.2, pp 1021 - 1041
Pages
21
Indexed
SCOPUS
ESCI
Journal Title
JOURNAL OF ANALYSIS
Volume
34
Number
2
Start Page
1021
End Page
1041
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/213356
DOI
10.1007/s41478-025-00985-8
ISSN
0971-3611
2367-2501
Abstract
Using Brzdek's fixed point technique, we investigate the Hyers-Ulam stability of the following functional equation: ah(axy/x+y) =h(x)+h(y) for all x,y is an element of R+, where a is a fixed positive real number.
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