EndOfLine represents the end of a line in a string for purposes of matching in StringExpression.
ExactNumberQ[expr] returns True if expr is an exact real or complex number, and returns False otherwise.
ExponentFunction is an option for NumberForm and related functions that determines the exponent to use in printing approximate real numbers.
MarcumQ
(Built-in Mathematica Symbol) MarcumQ[m, a, b] gives Marcum's Q function Q_m (a, b).MarcumQ[m, a, b_0, b_1] gives Marcum's Q function Q_m (a, b_0) - Q_m (a, b_1).
MathieuC[a, q, z] gives the even Mathieu function with characteristic value a and parameter q.
MathieuS[a, q, z] gives the odd Mathieu function with characteristic value a and parameter q.
PlotStyle is an option for plotting and related functions that specifies styles in which objects are to be drawn.
QHypergeometricPFQ[{a_1, ..., a_r}, {b_1, ..., b_s}, q, z] gives the basic hypergeometric series \[Null]_r \[Phi]_s (a; b; q; z).
Ratios
(Built-in Mathematica Symbol) Ratios[list] gives the successive ratios of elements in list. Ratios[list, n] gives the n\[Null]^th iterated ratios of list. Ratios[list, {n_1, n_2, ...}] gives the ...
RootOfUnityQ[a] yields True if a is a root of unity, and yields False otherwise.