LeftUpDownVector
\[LeftUpDownVector]
Infix arrow-like operator. x y is by default interpreted as LeftUpDownVector[x, y]. Extensible character. See The Mathematica Book: Section 3.10.4. See also: \[RightUpDownVector] , \[UpEquilibrium] , \[UpArrowDownArrow] , \[LeftRightVector] .