Documentation Publicon Reference Special Characters
NotReverseElement
\[NotReverseElement]
• Alias: !mem. • Infix set relation operator. • x y is by default interpreted as NotReverseElement[x, y].• See also: \[ReverseElement] , \[NotElement] .
\[NotReverseElement]
!mem
y is by default interpreted as NotReverseElement[x, y].