SphericalBesselJ (Built-in Mathematica Symbol)

SphericalBesselJ[n, z] gives the spherical Bessel function of the first kind j_n (z).

RamanujanTauZ (Built-in Mathematica Symbol)

RamanujanTauZ[t] gives the Ramanujan tau Z-function Z(t).

InverseErfc (Built-in Mathematica Symbol)

InverseErfc[s] gives the inverse complementary error function obtained as the solution for z in s = erfc(z).

SphericalBesselY (Built-in Mathematica Symbol)

SphericalBesselY[n, z] gives the spherical Bessel function of the second kind y_n (z).

WhittakerW (Built-in Mathematica Symbol)

WhittakerW[k, m, z] gives the Whittaker function W k, m (z).