“…Recently, some authors have published some papers on stability of functional equations in several spaces by the direct method and the fixed point method, for example, Banach spaces [6][7][8], fuzzy Menger normed algebras [9], fuzzy normed spaces [10], non-Archimedean random Lie C * -algebras [11], non-Archimedean random normed spaces [12], random multinormed space [13], random lattice normed spaces, and random normed algebras [14,15]. In [16,17], the authors studied the stability problem for fractional equations. Next, Cȃdariu et al [18][19][20] applied the fixed point method to solve the stability problem, and their work was continued by Keltouma et al [21], Park et al [22,23], Jung and Lee [24], and Brzdȩk and Ciepliński [25], see also [26,27].…”