Disjoint Sets

Pronunciation: /dɪsˈdʒɔɪnt/ ?

Two sets are disjoint if they have no members in common.[1] This is stated mathematically as A ∩ B = ∅.

Two disjoint sets having no members in common.
Figure 1: Disjoint Sets


  1. disjoint. merriam-webster.com. Encyclopedia Britannica. (Accessed: 2009-03-12). http://www.merriam-webster.com/dictionary/disjoint.
  2. Gilbert, Jimmie; and Gilbert Linda. Elements of Modern Algebra, 6th edition, pg 4. Thomson, Brooks/Cole, 2005.
  3. Seymour Lipschutz. Schaum's Outline of Set Theory and Related Topics, 2nd edition, pg 4. McGraw-Hill, July 1, 1998.
  4. Paul R. Halmos. Naive Set Theory, 1st edition, pg 4. Springer, January 16, 1998.

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Disjoint Sets. 2010-01-23. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/d/disjoint.html.


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2008-03-28: Initial version (McAdams, David.)

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