$UserName gives the login name of the user who invoked the Mathematica kernel, as recorded by the operating system.

$MachineID is a string that gives, if possible, a unique identification code for the computer on which Mathematica is being run.

$ParentProcessID gives the ID assigned to the process which invokes the Mathematica kernel by the operating system under which it is run.

$MachineDomains is a list of strings giving the names of the current network domains associated with the computer on which Mathematica is being run.

Mathematica provides broad and deep built-in support for both programmatic and interactive modern industrial-strength image processing —fully integrated with Mathematica's ...

 

Turning conditions into numbers. Boole[expr] is a basic function that turns True and False into 1 and 0. It is sometimes known as the characteristic function or indicator ...

 

FindArgMax[f, x] gives the position x_max of a local maximum of f.FindArgMax[f, {x, x_0}] gives the position x_max of a local maximum of f, found by a search starting from ...

FindMaxValue[f, x] gives the value at a local maximum of f.FindMaxValue[f, {x, x_0}] gives the value at a local maximum of f, found by a search starting from the point x = ...