Function: lerchzeta
Section: transcendental
C-Name: lerchzeta
Prototype: GGGp
Help: lerchzeta(s,a,lam): Lerch zeta function equal to sum for n >= 0 of
 e^(2 pi i lam n) / (n+a)^s for reasonable values of the arguments.
Doc: Lerch zeta function
 $$L(s,a,\lambda)=\sum_{n\ge0}e^{2\pi i\lambda n}(n+a)^{-s}$$
 and analytically continued, for reasonable values of the arguments.

Function: _lerch_worker
Section: programming/internals
C-Name: lerch_worker
Prototype: GG
Help: _lerch_worker(E,t): worker for lerchzeta
Doc: auxiliary.
