GoldenRatio is the golden ratio \[Phi] = 1/2 (Sqrt[5] + 1), with numerical value \[TildeEqual] 1.61803.
JacobiSymbol[n, m] gives the Jacobi symbol (n/m).
Message
(Built-in Mathematica Symbol) Message[symbol::tag] prints the message symbol::tag unless it has been switched off. Message[symbol::tag, e_1, e_2, ...] prints a message, inserting the values of the e_i as ...
NumericFunction is an attribute that can be assigned to a symbol f to indicate that f[arg_1, arg_2, ...] should be considered a numeric quantity whenever all the arg_i are ...
Pi
(Built-in Mathematica Symbol) Pi is \[Pi], with numerical value \[TildeEqual] 3.14159.
PlotLabel is an option for graphics functions that specifies an overall label for a plot.
Power
(Built-in Mathematica Symbol) x^y gives x to the power y.
PowerSymmetricPolynomial[r] represents a formal power symmetric polynomial with exponent r.PowerSymmetricPolynomial[{r_1, r_2, ...}] represents a multivariate formal power ...
QHypergeometricPFQ[{a_1, ..., a_r}, {b_1, ..., b_s}, q, z] gives the basic hypergeometric series \[Null]_r \[Phi]_s (a; b; q; z).
Rational is the head used for rational numbers.