\[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] .
Usage
\[UnionPlus] Notes
y is by default interpreted as UnionPlus[x, y]. 
