TagUnset (Built-in Mathematica Symbol)

f /: lhs =. removes any rules defined for lhs, associated with the symbol f.

$ControlActiveSetting (Built-in Mathematica Symbol)

$ControlActiveSetting is a symbol whose value is True if it is evaluated while a control is active, or in certain other previewing situations.

$MachineID (Built-in Mathematica Symbol)

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

ImageDimensions (Built-in Mathematica Symbol)

ImageDimensions[image] gives the pixel dimensions of the raster associated with an Image object image.

Null (Built-in Mathematica Symbol)

Null is a symbol used to indicate the absence of an expression or a result. It is not displayed in ordinary output. When Null appears as a complete output expression, no ...

$NumberMarks (Built-in Mathematica Symbol)

$NumberMarks gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.

Complex (Built-in Mathematica Symbol)

Complex is the head used for complex numbers.

Using a Text-Based Interface (Mathematica Tutorial)

The standard front end interface, as discussed in "Using a Notebook Interface", is appropriate for most users' purposes. In some cases, however, you may not need to use the ...

ArrayPlot (Built-in Mathematica Symbol)

ArrayPlot[array] generates a plot in which the values in an array are shown in a discrete array of squares.

Generating and Importing TeX (Mathematica Tutorial)

Mathematica notebooks provide a sophisticated environment for creating technical documents. But particularly if you want to merge your work with existing material in TeX, you ...