چكيده به لاتين
In this thesis, in addition of expression the concept of stability of the functional equations in Banach spaces,some related theorems and initial examples have been represented.
After that by introducing the n-normed space, the related initial topological concepts are represented.
subsequently, we investigate the stability on some functional equations in n-Banach spaces suach as additive, Jensen and quadratic ones. Except the direct procedure, since investigation of the stability of the equation by fixedpoint method is interested, investigation of the stability of some of the functional equations in n-Banachspace by fixed point method is represented too
