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Comment on “Approximate ternary Jordan derivations on Banach ternary algebras” [Bavand Savadkouhi<i>et al.</i>J. Math. Phys. 50, 042303 (2009)]
Let A be a Banach ternary algebra over C and X a ternary Banach A-module. A C-linear mapping D:(A,[ ]A)→(X,[ ]X) is called a ternary Jordan derivation if D([xxx]A)=[D(x)xx]X+[xD(x)x]X+[xxD(x)]X for all x∊A. [Bavand Savadkouhi et al., J. Math. Phys. 50, 042303 (2009)] investigated ternary Jordan derivations on Banach ternary algebras, …