DocumentationMathematicaThe Mathematica BookMathematica Reference GuideListing of Named Characters
NotSquareSupersetEqual
\[NotSquareSupersetEqual]
Infix set relation operator. x y is by default interpreted as NotSquareSupersetEqual[x, y]. See Section 3.10.4. See also: \[NotSquareSuperset] , \[SquareSupersetEqual] .