Turkish Journal of Mathematics
Abstract
Using the Brzdek fixed point theorem, we establish the Hyers?Ulam stability problem of Drygas functional equations \begin{equation} \delta(x+y-z)+\delta(x-y)+\delta(-y-z)+\delta(y)=\delta(x-y-z)+\delta(y-z)+\delta(x+y)+\delta(-y)\nonumber \end{equation} for all $x,y,z\in A$.
DOI
10.55730/1300-0098.3462
Keywords
Brzdek fixed point theorem, Drygas functional equation, stability
First Page
1778
Last Page
1790
Recommended Citation
DEHGHANIAN, M, & SAYYARI, Y (2023). The application of Brzdek's fixed point theorem in the stability problem of the Drygas functional equation. Turkish Journal of Mathematics 47 (6): 1778-1790. https://doi.org/10.55730/1300-0098.3462
