HumpDownHump[x, y, ...] displays as x \[HumpDownHump] y \[HumpDownHump] ....
HumpEqual[x, y, ...] displays as x \[HumpEqual] y \[HumpEqual] ....
IntervalUnion[interval_1, interval_2, ...] gives the interval representing the set of all points in any of the interval_i.
LeftArrowBar[x, y, ...] displays as x \[LeftArrowBar] y \[LeftArrowBar] ....
LeftArrow[x, y, ...] displays as x \[LeftArrow] y \[LeftArrow] ....
LeftArrowRightArrow[x, y, ...] displays as x \[LeftArrowRightArrow] y \[LeftArrowRightArrow] ....
LeftDownTeeVector[x, y, ...] displays as x\[LeftDownTeeVector]y\[LeftDownTeeVector]....
LeftDownVectorBar[x, y, ...] displays as x\[LeftDownVectorBar]y\[LeftDownVectorBar]....
LeftDownVector[x, y, ...] displays as x\[LeftDownVector]y\[LeftDownVector]....
LeftRightArrow[x, y, ...] displays as x \[LeftRightArrow] y \[LeftRightArrow] ....