Length[expr] gives the number of elements in expr.

Recognize is now available as the newly added built-in Mathematica kernel function RootApproximant.

IntervalIntersection[interval_1, interval_2, ...] gives the interval representing all points common to each of the interval_i.

$Failed is a special symbol returned by certain functions when they cannot do what they were asked to do.

BooleanVariables[expr] gives a list of the Boolean variables in the Boolean expression expr.BooleanVariables[bf] gives the number of Boolean variables in the BooleanFunction ...

The history of an interactive Mathematica computation is both maintained in a fully editable Mathematica notebook, and is stored symbolically in a sequence of In and Out ...

FindIndependentVertexSet[g] finds an independent vertex set of the graph g with a maximum number of vertices.

You can enable logging in two ways. The log file records messages as they occur, building up a detailed record of license activity over a period of time. Logging supports ...

RidgeFilter[image] computes a measure for the presence of a ridge for each pixel in image.RidgeFilter[image, \[Sigma]] uses the specified ridge scale \[Sigma].

Documentation Center opens the Wolfram Mathematica Documentation Center.