“…In recent years, the Hyers-Ulam stability of several objects (for instance functional equations and inequalities, isometries, differential, difference, integral and integro-differential equations, flows, groups, vector measures, and C*algebras) has been studied by many researchers (for more information on this notion as well as its applications we refer the reader to papers [1][2][3]5,8,9,[12][13][14]16,[18][19][20][24][25][26]30] and books [7,23]).…”