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\[RightTriangle]\[RightTriangleEqual]

RightTriangleBar

RightTriangleBar \[RightTriangleBar]

FilledSmallSquare Infix ordering operator.

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

FilledSmallSquare See The Mathematica Book: Section 3.10.4.

FilledSmallSquare See also: \[RightTriangle] , \[RightTriangleEqual] , \[RightArrowBar] , \[NotRightTriangleBar] .

\[RightTriangle]\[RightTriangleEqual]