Type-2 fuzzy sets extend the classical concept of fuzzy sets by allowing the membership grade itself to be a fuzzy set. This extension provides a richer mathematical framework for representing ...
SIAM Journal on Applied Mathematics, Vol. 40, No. 2 (Apr., 1981), pp. 339-357 (19 pages) In Part I, a generalization of the Fuzzy c-Means (or Fuzzy ISODATA) clustering algorithms is developed.
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