NumberFieldFundamentalUnits[a] gives a list of fundamental units for the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.
Opener
(Built-in Mathematica Symbol) Opener[x] represents an opener with setting x, displayed as OpenerBox[True] when x is True and OpenerBox[False] when x is False. Opener[Dynamic[x]] takes the setting to be ...
PartitionsP[n] gives the number p (n) of unrestricted partitions of the integer n.
PartitionsQ[n] gives the number q (n) of partitions of the integer n into distinct parts.
PascalDistribution[n, p] represents a Pascal distribution with parameters n and p.
Piecewise[{{val_1, cond_1}, {val_2, cond_2}, ...}] represents a piecewise function with values val_i in the regions defined by the conditions cond_i. Piecewise[{{val_1, ...
PrimeQ
(Built-in Mathematica Symbol) PrimeQ[expr] yields True if expr is a prime number, and yields False otherwise.
expr /. rules applies a rule or list of rules in an attempt to transform each subpart of an expression expr.
RootOfUnityQ[a] yields True if a is a root of unity, and yields False otherwise.
Round
(Built-in Mathematica Symbol) Round[x] gives the integer closest to x. Round[x, a] rounds to the nearest multiple of a.