Explore Union on MathWorld

The union of two or more sets is is the set consisting of the combination of all members of all set.

Union is a high school-level concept that would be first encountered in an algebra course.


Set: In mathematics, a set is a finite or infinite collection of objects in which order has no significance and multiplicity is generally also ignored.

Classroom Articles on Algebra (Up to High School Level)

  • Coefficient
  • Quadratic Formula
  • Geometric Mean
  • Root
  • Infinity
  • Subset
  • Quadratic Equation