ArcTanh (Built-in Mathematica Symbol)

ArcTanh[z] gives the inverse hyperbolic tangent tanh -1 (z) of the complex number z.

BesselI (Built-in Mathematica Symbol)

BesselI[n, z] gives the modified Bessel function of the first kind I_n (z).

BesselJZero (Built-in Mathematica Symbol)

BesselJZero[n, k] represents the k\[Null]^th zero of the Bessel function J_n (x).BesselJZero[n, k, x_0] represents the k\[Null]^th zero greater than x_0.

BesselK (Built-in Mathematica Symbol)

BesselK[n, z] gives the modified Bessel function of the second kind K_n (z).

BesselY (Built-in Mathematica Symbol)

BesselY[n, z] gives the Bessel function of the second kind Y_n (z).

ChebyshevT (Built-in Mathematica Symbol)

ChebyshevT[n, x] gives the Chebyshev polynomial of the first kind T_n (x).

ChebyshevU (Built-in Mathematica Symbol)

ChebyshevU[n, x] gives the Chebyshev polynomial of the second kind U_n (x).

DawsonF (Built-in Mathematica Symbol)

DawsonF[z] gives the Dawson integral F(z).

DedekindEta (Built-in Mathematica Symbol)

DedekindEta[\[Tau]] gives the Dedekind eta modular elliptic function \[Eta](\[Tau]).

DirichletL (Built-in Mathematica Symbol)

DirichletL[k, j, s] gives the Dirichlet L-function L(\[Chi], s) for the Dirichlet character \[Chi](n) with modulus k and index j.