University of MaraghehSahand Communications in Mathematical Analysis2322-580714120190401Fuzzy Best Simultaneous Approximation of a Finite Numbers of Functions971063448810.22130/scma.2018.65402.258ENHossainAlizadeh NazarkandiDepartment of Mathematics,Marand Branch, Islamic azad university, Marand, Iran.Journal Article20170701Fuzzy best simultaneous approximation of a finite number of functions is considered. For this purpose, a fuzzy norm on $C\left (X, Y \right )$ and its fuzzy dual space and also theĀ set of subgradients of a fuzzy norm are introduced. Necessary case of a proved theorem about characterization of simultaneous approximation will be extended to the fuzzy case.https://scma.maragheh.ac.ir/article_34488_9c921f0195723c22bf32660b63754739.pdf