RamanujanTauZ[t] gives the Ramanujan tau Z-function Z(t).
TimeUsed[] gives the total number of seconds of CPU time used so far in the current Mathematica session.
LucasL
(Built-in Mathematica Symbol) LucasL[n] gives the Lucas number L_n.LucasL[n, x] gives the Lucas polynomial L_n (x).
Interface definitions can be defined using either a Mathematica expression or an XML definition. For many usages the Mathematica syntax is preferred. However, in cases where ...
ToCompactXML[expr] generates an equivalent SymbolicXML expression that suppresses all the redundant namespace information for elements and attributes in expr. ...
In some cases it is useful to split the differential system into subsystems and solve each subsystem using appropriate integration methods. Recombining the individual ...
DirichletConvolve[f, g, n, m] gives the Dirichlet convolution of the expressions f and g.
DirichletTransform[expr, n, s] gives the Dirichlet transform of expr with respect to n.
Hyperfactorial[n] gives the hyperfactorial function H(n).
QGamma
(Built-in Mathematica Symbol) QGamma[z, q] gives the q-gamma function \[CapitalGamma]_q (z).