For the definition, I think it would be better if the intuitionistic fuzzy set is denoted by $\displaystyle{ A^{*} }$ or $\displaystyle{ \hat{A} }$ to stress that this set, though it depends on $\displaystyle{ A }$, is different from it. Then it may be stated that in order to avoid cumbersome notation we will further use simply $\displaystyle{ A }$ when referring IFS. --Peter Vassilev, 10:52, 8 November 2008 (UTC)