As of Version 7.0, FindDivisions has been added to the built-in Mathematica kernel.

FromPackedArray[expr] unpacks expr so that its internal representation is not a packed array.

ReplaceAllUnheld[expr, rules] applies a rule or list of rules in an attempt to transform each subpart of expr that would be automatically evaluated.

ToPackedArray[expr] uses packed arrays if possible in the internal representation of expr.

As of Version 6.0, ZeroQ has been superseded by PossibleZeroQ.

$MaxMachineInteger gives the maximum integer that is represented internally as a single atomic data element on your computer system.

DifferentialEquationTrek is a setting for the option TrekGenerator that specifies that treks are generated from the phase space of the numerical solution of a differential ...

EquationTrekker[eqn, x, {t, t_min, t_max}] opens a graphical interface for specifying initial conditions and plotting the resulting numerical solution to the first or second ...

EquationTrekkerState[{eqns, dvars, {t, t_min, t_max}}, params, treks, opts] is the data object returned by the function EquationTrekker, that contains the information needed ...

PoincareSection is a setting for the option TrekGenerator that specifies that the Poincaré section for differential equations is used to generate treks.