JacobiZeta[\[Phi], m] gives the Jacobi zeta function Z(\[Phi] \[VerticalSeparator] m).
KleinInvariantJ[\[Tau]] gives the Klein invariant modular elliptic function J(\[Tau]).
LegendreP[n, x] gives the Legendre polynomial P_n (x). LegendreP[n, m, x] gives the associated Legendre polynomial P_n^m(x).
LerchPhi[z, s, a] gives the Lerch transcendent \[CapitalPhi] (z, s, a).
LogGamma[z] gives the logarithm of the gamma function log \[CapitalGamma](z).
Nearest
(Built-in Mathematica Symbol) Nearest[{elem_1, elem_2, ...}, x] gives the list of elem_i to which x is nearest. Nearest[{elem_1 -> v_1, elem_2 -> v_2, ...}, x] gives the v_i corresponding to the elem_i to ...
NevilleThetaD[z, m] gives the Neville theta function \[CurlyTheta]_d (z \[VerticalSeparator] m).
PermutationProduct[a, b, c] gives the product of permutations a, b, c.
Permute
(Built-in Mathematica Symbol) Permute[expr, perm] permutes the positions of the elements of expr according to the permutation perm.Permute[expr, gr] returns the list of permuted forms of expr under the ...
QBinomial[n, m, q] gives the q-binomial coefficient (n; m)_q.