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NestedLessLess \[NestedLessLess]

FilledSmallSquare Infix ordering operator.

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

FilledSmallSquare Used to denote "much less than".

FilledSmallSquare Occasionally used in measure theory to denote "absolutely continuous with respect to".

FilledSmallSquare See The Mathematica Book: Section 3.10.4.

FilledSmallSquare See also: \[LessLess] , \[NotLessLess] , \[NotNestedLessLess] .