Unicode: 000A. Raw operator. Inserted whenever a raw newline is entered on the keyboard. Forces a line break in an expression, fixing the indenting level at the time when the ...
Unicode: 2060. Alias: Esc nb Esc. Letter-like form. Used to indicate that no line break can occur at this position in an expression.
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".
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.
\[Null]
(Mathematica Character Name) Unicode: F3A0. Alias: Esc null Esc. Letter-like form. Can be used to place subscripts and superscripts without having a visible base.
Unicode: 0151. Alias: Esc o'' Esc. Letter. Included in ISO Latin-2. Used in Hungarian, for example in the name Erd ős.
\[Phi]
(Mathematica Character Name) Unicode: 03D5. Aliases: Esc ph Esc, Esc phi Esc, Esc f Esc. Greek letter. Used in TraditionalForm for EulerPhi and GoldenRatio.
Unicode: 227A. Infix ordering operator. x ≺ y is by default interpreted as Precedes[x,y]. Used in mathematics to indicate various notions of partial ordering. Often applied ...
\[Psi]
(Mathematica Character Name) Unicode: 03C8. Aliases: Esc ps Esc, Esc psi Esc, Esc y Esc. Greek letter. Used in TraditionalForm for PolyGamma.
Unicode: 002E. Raw operator. Equivalent to the ordinary ASCII character with code 46. As an overscript, used to indicate time derivative. OverscriptBox[x, .] is interpreted ...