Unicode: 21A6. Infix arrow operator. x ↦ y is by default interpreted as RightTeeArrow[x,y]. Used in mathematics to indicate a transformation, often the action of a mapping on ...

Unicode: F51F. Alias: Esc :> Esc. Infix operator with built-in evaluation rules. x  y is by default interpreted as x:>y or RuleDelayed[x,y]. x  y  z groups as x  (y  z).

Unicode: 2043. Uninterpretable element. ⁃ name ⁃ is used on output to indicate an expression that has head name, but whose arguments will not explicitly be given. ...

Unicode: 221A. Alias: Esc sqrt Esc. Prefix operator with built-in evaluation rules. √ x is by default interpreted as Sqrt[x]. Ctrl+@, Ctrl+2 or ∖@ yields a complete SqrtBox ...

Unicode: F520. Alias: Esc sq Esc. Prefix operator.  x is by default interpreted as Square[x]. Used in mathematical physics to denote the d'Alembertian operator. Sometimes ...

Unicode: 228F. Infix set relation operator. x ⊏ y is by default interpreted as SquareSubset[x,y]. Used in computer science to indicate that x is a substring occurring at the ...

Unicode: 2290. Infix set relation operator. x ⊐ y is by default interpreted as SquareSuperset[x,y]. Used in computer science to indicate that x is a substring occurring at ...

Unicode: 220D. Alias: Esc st Esc. Infix operator. x ∍ y is by default interpreted as SuchThat[x,y]. x ∍ y ∍ z groups as x ∍ (y ∍ z). Not the same as \[ReverseElement].

Unicode: 2234. Alias: Esc tf Esc. Infix operator. x ∴ y is by default interpreted as Therefore[x,y]. x ∴ y ∴ z groups as x ∴ (y ∴ z).

Unicode: 2005. Alias: Esc ␣␣ ␣␣ Esc. Spacing character. Width: 5/18 em. Interpreted by default just like an ordinary \[RawSpace].