Fixed points and stability of nonic functional equation in quasi-β-normed spaces

Fixed points and stability of Icosic functional equation in quasi-b-normed spaces

“…The fixed point alternative method can be considered as an advantage of this method over the standard direct method. The stability problems of several various functional equations have been extensively investigated by a number of authors using fixed point methods (see, [2,11,12,18,24]). …”

A fixed point approach to Ulam-Hyers stability of duodecic functional equation in quasi-$β$-normed spaces

“…During the last three decades, several stability problems for various functional equations have been investigated by numerous mathematicians. We refer the reader to the survey articles on stabilities of various functional equations, one can see ( [4], [5], [10], [11], [13], [23], [24], [28], [29], [25], [34], [38], [39], [40]) and monographs ( [6], [8], [15]) and references therein.…”

Fundamental Stabilities of the Nonic Functional Equation in Intuitionistic Fuzzy Normed Spaces

“…(1) It is easy to check that the function f (x) = ax 9 is a solution of the functional equation (1). Indeed, general solution of the equation (1) was found in [18]. In this paper, we study some stability results concerning the functional equation (1) in the setting of intuitionistic fuzzy normed spaces.…”