PrimeOmega (Built-in Mathematica Symbol)

PrimeOmega[n] gives the number of prime factors counting multiplicities \[CapitalOmega](n) in n.

PrimePi (Built-in Mathematica Symbol)

PrimePi[x] gives the number of primes \[Pi] (x) less than or equal to x.

PrimeZetaP (Built-in Mathematica Symbol)

PrimeZetaP[s] gives prime zeta function P(s).

QFactorial (Built-in Mathematica Symbol)

QFactorial[n, q] gives the q-factorial [n] q!.

QGamma (Built-in Mathematica Symbol)

QGamma[z, q] gives the q-gamma function \[CapitalGamma]_q (z).

Rationals (Built-in Mathematica Symbol)

Rationals represents the domain of rational numbers, as in x \[Element] Rationals.

RiemannR (Built-in Mathematica Symbol)

RiemannR[x] gives the Riemann prime counting function R(x).

SphericalBesselJ (Built-in Mathematica Symbol)

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

SphericalBesselY (Built-in Mathematica Symbol)

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

SphericalHankelH1 (Built-in Mathematica Symbol)

SphericalHankelH1[n, z] gives the spherical Hankel function of the first kind h_n^(1)(z).