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DoubleLongLeftArrow \[DoubleLongLeftArrow]

FilledSmallSquare Alias: AliasIndicator<==AliasIndicator.

FilledSmallSquare Infix arrow operator.

FilledSmallSquarex y is by default interpreted as DoubleLongLeftArrow[x, y].

FilledSmallSquare See The Mathematica Book: Section 3.10.4.

FilledSmallSquare See also: \[DoubleLeftArrow] , \[LongLeftArrow] , \[DoubleLongRightArrow] .