ToUpperCase (Built-in Mathematica Symbol)

ToUpperCase[string] yields a string in which all letters have been converted to uppercase.

TraceOff (Built-in Mathematica Symbol)

TraceOff is an option for Trace and related functions which specifies forms inside which tracing should be switched off.

TransformationMatrix (Built-in Mathematica Symbol)

TransformationMatrix[tfun] gives the homogeneous matrix associated with a TransformationFunction object.

UnderoverscriptBox (Built-in Mathematica Symbol)

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

WeierstrassInvariants (Built-in Mathematica Symbol)

WeierstrassInvariants[{\[Omega], \[Omega]^\[Prime]}] gives the invariants {g_2, g_3} for Weierstrass elliptic functions corresponding to the half-periods {\[Omega], ...

$ContextPath (Built-in Mathematica Symbol)

$ContextPath is a global variable that gives a list of contexts, after $Context, to search in trying to find a symbol that has been entered.

$CurrentLink (Built-in Mathematica Symbol)

$CurrentLink is the LinkObject representing the MathLink connection for an external program currently being installed or being called.

$KernelID (Built-in Mathematica Symbol)

$KernelID is a unique ID number assigned to each running parallel kernel.

$MaxNumber (Built-in Mathematica Symbol)

$MaxNumber gives the maximum arbitrary-precision number that can be represented on a particular computer system.

Exact Higher-Order Equations (Mathematica Tutorial)

A linear ordinary differential equation of order n is said to be exact if The condition of exactness can be used to reduce the problem to that of solving an equation of order ...