MathieuCharacteristicB[r, q] gives the characteristic value b_r for odd Mathieu functions with characteristic exponent r and parameter q.
MathieuCharacteristicExponent[a, q] gives the characteristic exponent r for Mathieu functions with characteristic value a and parameter q.
MathieuCPrime[a, q, z] gives the derivative with respect to z of the even Mathieu function with characteristic value a and parameter q.
MathieuSPrime[a, q, z] gives the derivative with respect to z of the odd Mathieu function with characteristic value a and parameter q.
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).
RamanujanTauTheta[t] gives the Ramanujan tau theta function \[Theta](t).
RamanujanTauZ[t] gives the Ramanujan tau Z-function Z(t).
RiemannR[x] gives the Riemann prime counting function R(x).