TraceOn (Built-in Mathematica Symbol)

TraceOn is an option for Trace and related functions which specifies when tracing should be switched on.

TracePrint (Built-in Mathematica Symbol)

TracePrint[expr] prints all expressions used in the evaluation of expr. TracePrint[expr, form] includes only those expressions which match form. TracePrint[expr, s] includes ...

TrackedSymbols (Built-in Mathematica Symbol)

TrackedSymbols is an option to Refresh, Manipulate, and related functions that specifies which symbols should trigger updates when their values are changed.

TransformationFunctions (Built-in Mathematica Symbol)

TransformationFunctions is an option for Simplify and FullSimplify which gives the list of functions to apply to try to transform parts of an expression.

Trig (Built-in Mathematica Symbol)

Trig is an option for various polynomial manipulation functions that specifies whether trigonometric functions should be treated like polynomial elements.

True (Built-in Mathematica Symbol)

True is the symbol for the Boolean value true.

Uncompress (Built-in Mathematica Symbol)

Uncompress["string"] recovers an expression from a compressed string representation generated by Compress.Uncompress["string", h] wraps the head h around the expression ...

Undefined (Built-in Mathematica Symbol)

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

UnderoverscriptBox (Built-in Mathematica Symbol)

UnderoverscriptBox[x, y, z] is the low-level box representation for x_y^z in notebook expressions.

Unevaluated (Built-in Mathematica Symbol)

Unevaluated[expr] represents the unevaluated form of expr when it appears as the argument to a function.