Abstract
In this paper, we determine some stability results concerning the Jensen functional equation
2
f
(
(
x
+
y
)
/
2
)
=
f
(
x
)
+
f
(
y
)
in intuitionistic fuzzy normed spaces (IFNS). We define the intuitionistic fuzzy continuity of the Jensen mappings and prove that the existence of a solution for any approximately Jensen mapping implies the completeness of IFNS.