PrivateFontOptions (Built-in Mathematica Symbol)

PrivateFontOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for various font suboptions.

ReplaceRepeated (Built-in Mathematica Symbol)

expr //. rules repeatedly performs replacements until expr no longer changes.

SequenceHold (Built-in Mathematica Symbol)

SequenceHold is an attribute that specifies that Sequence objects appearing in the arguments of a function should not automatically be flattened out.

SpellingOptions (Built-in Mathematica Symbol)

SpellingOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies settings for spell checking.

SyntaxForm (Built-in Mathematica Symbol)

SyntaxForm is an option for InterpretationBox and TagBox objects that specifies the precedence level to use when the InterpretationBox or TagBox is considered as an operator.

ToContinuousTimeModel (Built-in Mathematica Symbol)

ToContinuousTimeModel[sys] gives the continuous-time approximation of the discrete-time TransferFunctionModel or StateSpaceModel object sys.ToContinuousTimeModel[tf, s] gives ...

Undefined (Built-in Mathematica Symbol)

Undefined is a symbol that represents a quantity with no defined value.

ValueQ (Built-in Mathematica Symbol)

ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

Variables (Built-in Mathematica Symbol)

Variables[poly] gives a list of all independent variables in a polynomial.

$Pre (Built-in Mathematica Symbol)

$Pre is a global variable whose value, if set, is applied to every input expression.