DoubleLongLeftArrow
\[DoubleLongLeftArrow]
Alias: <==. Infix arrow operator. x y is by default interpreted as DoubleLongLeftArrow[x, y]. See The Mathematica Book: Section 3.10.4. See also: \[DoubleLeftArrow] , \[LongLeftArrow] , \[DoubleLongRightArrow] .