In the theory of differential equations and Abelian varieties, Riemann theta functions and their relatives play an important role. Implement these in Sage!

See also:

• RiemannTheta --
  A Sagemath package for evaluating Riemann theta functions
  with characteristics numerically to arbitrary precision,
  as well as their derivatives

CC: @cswiercz @fredrik-johansson @mstreng @jpflori @slel

Component: numerical

Keywords: riemann theta klein

Author: Nick Alexander, Chris Swierczewski

Branch/Commit: u/chapoton/6371 @ 0342ce9

Reviewer: Marco Streng, Bernard Deconinck

Issue created by migration from https://trac.sagemath.org/ticket/6371