MathieuCharacteristicA[r, q] gives the characteristic value a_r for even Mathieu functions with characteristic exponent r and parameter q.
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.
RamanujanTauTheta[t] gives the Ramanujan tau theta function \[Theta](t).
RamanujanTauZ[t] gives the Ramanujan tau Z-function Z(t).
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).
SphericalHankelH1[n, z] gives the spherical Hankel function of the first kind h_n^(1)(z).