OverHat (Built-in Mathematica Symbol)

OverHat[expr] displays with a hat over expr.

Overlaps (Built-in Mathematica Symbol)

Overlaps is an option to StringCases, StringCount, and StringPosition that specifies how to treat overlapping substrings.

Overlay (Built-in Mathematica Symbol)

Overlay[{expr_1, expr_2, ...}] displays as an overlay of all the expr_i.Overlay[{expr_1, expr_2, ...}, {i, j, ...}] displays as an overlay of expr_i, expr_j, ...

OverscriptBox (Built-in Mathematica Symbol)

OverscriptBox[x, y] is the low-level box representation for OverscriptBox[x, y] in notebook expressions.

OverscriptBoxOptions (Built-in Mathematica Symbol)

OverscriptBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option that specifies the style and display of OverscriptBox constructs.

Overscript (Built-in Mathematica Symbol)

Overscript[x, y] is an object that formats as OverscriptBox[x, y].

OverTilde (Built-in Mathematica Symbol)

OverTilde[expr] displays with a tilde over expr.

OverVector (Built-in Mathematica Symbol)

OverVector[expr] displays with a right vector over expr.

OwenT (Built-in Mathematica Symbol)

OwenT[x, a] gives Owen's T function T(x, a).

OwnValues (Built-in Mathematica Symbol)

OwnValues[x] gives the rule corresponding to any ownvalue defined for the symbol x.