the main purpose of this paper is to find t-best approximations in fuzzy normed spaces. we introduce the notions of t-proximinal sets and f-approximations and prove some interesting theorems. in particular, we investigate the set of all t-best approximations to an element from a set.

This paper proposes rough convergence and statistical of a double sequence in intuitionistic fuzzy normed spaces. It then defines the limit points cluster these Afterwards, this examines some their basic properties. Finally, it discusses need for further research.