This chapter focus on set theory, which was developed in the nineteenth century. Therein sets are defined as a collection of objects. They are introduced first and then extended to fuzzy sets. By allowing degrees of set memberships, they represent vagueness and imprecise information.

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Crisp and Fuzzy Sets

  • Hans-Heinrich Bothe,
  • Edy Portmann

摘要

This chapter focus on set theory, which was developed in the nineteenth century. Therein sets are defined as a collection of objects. They are introduced first and then extended to fuzzy sets. By allowing degrees of set memberships, they represent vagueness and imprecise information.