Fuzzy approximation theorems via power series summability methods in two variables.

This paper contains a power series summability method based on Korovkin type approximation theorem for a sequence of fuzzy positive linear operators in two variables. Besides that, a theorem related to fuzzy rate of convergence has been derived with the help of fuzzy modulus of continuity, which gives clarity to understanding the analogous observations between fuzzy set theory and classical theory. Additionally, an example is illustrated which gives a better idea to understand that summability in two variable-based Korovkin type theorem has less drawback over fuzzy set theory. [ABSTRACT FROM AUTHOR]