ExactNumberQ[expr] returns True if expr is an exact real or complex number, and returns False otherwise.
As of Version 8, much of the functionality covered by Combinatorica has been implemented in the Mathematica kernel. BooleanAlgebra CodeToLabeledTree HasseDiagram ...
DateList[] gives the current local date and time in the form {year, month, day, hour, minute, second}. DateList[time] gives a date list corresponding to an AbsoluteTime ...
PGM
(Mathematica Import/Export Format) MIME type: image/x-portable-graymap PGM grayscale raster image format. Member of the Portable family of image formats. Related to PBM and PPM. Implements a subset of the PNM ...
SCT
(Mathematica Import/Export Format) Scitex CT format. Raster image file format. Used for pre-press imaging applications. SCT is an acronym for Scitex Continuous Tone. Binary format. Stores images as RGB, CMYK, ...
Mathematica can be used to make plots of functions. You give Mathematica a function, and it builds up a curve or surface by evaluating the function at many different points. ...
Signature[list] gives the signature of the permutation needed to place the elements of list in canonical order.
FindMinValue[f, x] gives the value at a local minimum of f.FindMinValue[f, {x, x_0}] gives the value at a local minimum of f, found by a search starting from the point x = ...
PseudoInverse[m] finds the pseudoinverse of a rectangular matrix.
NormalDistribution[\[Mu], \[Sigma]] represents a normal (Gaussian) distribution with mean \[Mu] and standard deviation \[Sigma].NormalDistribution[] represents a normal ...