MouseAppearance[expr, graphic] changes the mouse cursor to appear as graphic when the mouse pointer is in the area where expr is displayed.MouseAppearance[expr, graphic, {x, ...

Opacity[a] is a graphics directive which specifies that graphical objects which follow are to be displayed, if possible, with opacity a. Opacity[a, color] uses the specified ...

PermutationCycles[perm] gives a disjoint cycle representation of permutation perm.

Play[f, {t, t_min, t_max}] creates an object that plays as a sound whose amplitude is given by f as a function of time t in seconds between t_min and t_max.

Sqrt[z] or Sqrt[z] gives the square root of z.

StirlingS2[n, m] gives the Stirling number of the second kind \[ScriptCapitalS]_n^(m).

$MachineEpsilon gives the difference between 1.0 and the next-nearest number representable as a machine-precision number.

Functions like Read and Write handle ordinary printable text. But in dealing with external data files or devices it is sometimes necessary to go to a lower level, and work ...

Modules in Mathematica allow you to treat the names of variables as local. Sometimes, however, you want the names to be global, but values to be local. You can do this in ...

The general principle that Mathematica follows in evaluating expressions is to go on applying transformation rules until the expressions no longer change. This means, for ...