SampledSoundFunction[f, n, r] is a sound primitive that represents a sound whose amplitude sampled r times a second is generated by applying the function f to successive ...
LayerSizeFunction is an option for TreePlot that gives a function to specify the relative height to allow for each layer.
LinearSolveFunction[dimensions, data] represents a function for providing solutions to a matrix equation.
CellEvaluationFunction is an option to Cell which gives a function to be applied to every expression from the cell that is sent to the kernel for ordinary evaluation.
MapIndexed[f, expr] applies f to the elements of expr, giving the part specification of each element as a second argument to f. MapIndexed[f, expr, levelspec] applies f to ...
LegendreP[n, x] gives the Legendre polynomial P_n (x). LegendreP[n, m, x] gives the associated Legendre polynomial P_n^m(x).
MathieuCPrime[a, q, z] gives the derivative with respect to z of the even Mathieu function with characteristic value a and parameter q.
EllipticTheta[a, u, q] gives the theta function \[CurlyTheta]_a (u, q) (a = 1, ..., 4).
PolyLog
(Built-in Mathematica Symbol) PolyLog[n, z] gives the polylogarithm function Li_n (z).PolyLog[n, p, z] gives the Nielsen generalized polylogarithm function S n, p (z).
DiscreteIndicator[x, x_1, {u_1, u_2, ...}] yields the discrete indicator function, equal to 1 if x = x_1 and 0 if x = u_i for any i.