\[LeftCeiling] (Mathematica Character Name)

Unicode: 2308. Alias: Esc lc Esc. Matchfix operator with built-in evaluation rules. ⌈ x ⌉ is by default interpreted as Ceiling[x]. Extensible character.

\[LeftFloor] (Mathematica Character Name)

Unicode: 230A. Alias: Esc lf Esc. Matchfix operator with built-in evaluation rules. ⌊ x ⌋ is by default interpreted as Floor[x]. Extensible character.

\[LessSlantEqual] (Mathematica Character Name)

Unicode: 2A7D. Alias: Esc </ Esc. Infix operator with built-in evaluation rules. x ⩽ y is by default interpreted as LessEqual[x,y].

\[LSlash] (Mathematica Character Name)

Unicode: 0142. Alias: Esc l/ Esc. Letter. Included in ISO Latin-2.

\[Nand] (Mathematica Character Name)

Unicode: 22BC. Alias: Esc nand Esc. Infix operator with built-in evaluation rules. x ⊼ y is by default interpreted as Nand[x,y].

\[NestedLessLess] (Mathematica Character Name)

Unicode: 2AA1. Infix ordering operator. x ⪡ y is by default interpreted as NestedLessLess[x,y]. Used to denote "much less than". Occasionally used in measure theory to denote ...

\[Nor] (Mathematica Character Name)

Unicode: 22BD. Alias: Esc nor Esc. Infix operator with built-in evaluation rules. x ⊽ y is by default interpreted as Nor[x,y].

\[NotDoubleVerticalBar] (Mathematica Character Name)

Unicode: 2226. Alias: Esc !|| Esc. Infix operator. x ∦ y is by default interpreted as NotDoubleVerticalBar[x,y]. Used in geometry to mean "not parallel to".

\[Not] (Mathematica Character Name)

Unicode: 00AC. Aliases: Esc ! Esc, Esc not Esc. Prefix operator with built-in evaluation rules. ¬ x is by default interpreted as Not[x], equivalent to !x.

\[NotVerticalBar] (Mathematica Character Name)

Unicode: 2224. Alias: Esc !| Esc. Infix operator. x  y is by default interpreted as NotVerticalBar[x,y]. Used in mathematics to mean x does not divide y.