MathieuSPrime[a, q, z] gives the derivative with respect to z of the odd Mathieu function with characteristic value a and parameter q.
PauliMatrix[k] gives the k\[Null]^th Pauli spin matrix \[Sigma]_k.
PrimeNu
(Built-in Mathematica Symbol) PrimeNu[n] gives the number of distinct primes \[Nu](n) in n.
PrimeOmega[n] gives the number of prime factors counting multiplicities \[CapitalOmega](n) in n.
PrimeZetaP[s] gives prime zeta function P(s).
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).
RiemannR[x] gives the Riemann prime counting function R(x).
SphericalBesselJ[n, z] gives the spherical Bessel function of the first kind j_n (z).
SphericalBesselY[n, z] gives the spherical Bessel function of the second kind y_n (z).