ExactNumberQ[expr] returns True if expr is an exact real or complex number, and returns False otherwise.
FileHash["file"] gives an integer hash code for the contents of the specified file.FileHash["file", " type"] gives an integer hash of the specified type.
FindDivisions[{x_min, x_max}, n] finds a list of about n "nice" numbers that divide the interval around x_min to x_max into equally spaced parts. FindDivisions[{x_min, x_max, ...
GraphHighlightStyle is an option to Graph and related objects that specifies styles to use for highlighted graph elements.
GraphStyle is an option to Graph and related objects that specifies styles to use for the different graph elements.
GraphUnion[g_1, g_2] gives the graph union of the graphs g_1 and g_2.GraphUnion[g_1, g_2, ...] gives the graph union of g_1, g_2, ....
ImageCorrespondingPoints[image_1, image_2] finds a set of matching interest points in image_1 and image_2 and returns their pixel coordinates.
IndexGraph[g] replaces the vertices of the graph g by its vertex indexes. IndexGraph[g, r] replaces the vertices with integers r, r + 1, ....
InexactNumberQ[expr] returns True if expr is an inexact real or complex number, and returns False otherwise.
NumberFieldRegulator[a] gives the regulator of the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.