This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Character Name


  • Unicode: 228E.
  • Infix operator.
  • x ⊎ y is by default interpreted as UnionPlus[x, y].
  • Used to denote union of multisets, in which multiplicities of elements are added.