ABSTRACT
The aim of this chapter is to define the concept of double Cesáro summability method in intuitionistic fuzzy normed spaces and show a related Tauberian theorem for double Cesáro summability method in intuitionistic fuzzy normed space. We also define slowly oscillating sequences in intuitionistic fuzzy normed spaces and prove related theorems. Furthermore, we show that double Cesáro summability of slowly oscillating sequences implies ordinary convergence in intuitionistic fuzzy normed spaces.
