Mod[m, n] gives the remainder on division of m by n. Mod[m, n, d] uses an offset d.

Nearest[{elem_1, elem_2, ...}, x] gives the list of elem_i to which x is nearest. Nearest[{elem_1 -> v_1, elem_2 -> v_2, ...}, x] gives the v_i corresponding to the elem_i to ...

Normal[expr] converts expr to a normal expression, from a variety of special forms.

Permute[expr, perm] permutes the positions of the elements of expr according to the permutation perm.Permute[expr, gr] returns the list of permuted forms of expr under the ...

PseudoInverse[m] finds the pseudoinverse of a rectangular matrix.

QBinomial[n, m, q] gives the q-binomial coefficient (n; m)_q.

Rationalize[x] converts an approximate number x to a nearby rational with small denominator. Rationalize[x, dx] yields the rational number with smallest denominator that lies ...

Rectangle[{x_min, y_min}, {x_max, y_max}] is a two-dimensional graphics primitive that represents a filled rectangle, oriented parallel to the axes. Rectangle[{x_min, y_min}] ...

RGBColor[red, green, blue] is a graphics directive specifying that objects that follow are to be displayed, if possible, in the color given. RGBColor[r, g, b, a] specifies ...

RootReduce[expr] attempts to reduce expr to a single Root object.