DocumentationMathematicaThe Mathematica BookMathematica Reference GuideListing of Named Characters
UnionPlus
\[UnionPlus]
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. See Section 3.10.4. See also: \[Union] , \[CirclePlus] .