Viewing topic: Proper Subset

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Proper Subset

  • Definition: A proper subset S' of a set S is a subset that is strictly contained in S and so necessarily excludes at least one member of S. The empty set is therefore a proper subset of any nonempty set.


  • Example: For example, consider a set {1,2,3,4,5}. Then {1,2,4} and {1} are proper subsets, while {1,2,6} and {1,2,3,4,5} are not.

  • Listed under: Discrete Mathematics, Set Theory

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