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).

DedekindEta (Built-in Mathematica Symbol)

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

Depth (Built-in Mathematica Symbol)

Depth[expr] gives the maximum number of indices needed to specify any part of expr, plus 1.

EllipticNomeQ (Built-in Mathematica Symbol)

EllipticNomeQ[m] gives the nome q corresponding to the parameter m in an elliptic function.

HankelH1 (Built-in Mathematica Symbol)

HankelH1[n, z] gives the Hankel function of the first kind H_n^(1)(z).

HankelH2 (Built-in Mathematica Symbol)

HankelH2[n, z] gives the Hankel function of the second kind H_n^(2)(z).

Hypergeometric0F1 (Built-in Mathematica Symbol)

Hypergeometric0F1[a, z] is the confluent hypergeometric function \[Null]_0 F_1 (; a; z).

Hypergeometric2F1Regularized (Built-in Mathematica Symbol)

Hypergeometric2F1Regularized[a, b, c, z] is the regularized hypergeometric function \[Null]_2 F_1 (a, b; c; z)/\[CapitalGamma](c).