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Set

A group of numbers, variables, geometric figures, or just about anything. Sets are written using set braces {}. For example, {1,2,3} is the set containing the elements 1, 2, and 3.

Note: Order does not matter in a set. The sets {a,b,c} and {c,a,b} are the same set. Repetition does not matter either, so {a,b} and {a,a,b,b,b} are the same set.

 

 

See also

Interval notation, set-builder notation, set intersection, union, set subtraction, Venn diagrams, solution set

 


  this page updated 28-jul-14
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes