EllipticTheta

EllipticTheta[a,u,q] gives the theta function ϑa(u,q) (a=1,…,4).

EllipticTheta[a,q] gives the theta constant ϑa(q)ϑa(0,q).

Examples

Evaluate the first theta function:

EllipticTheta[1, 0.5, 0.1]
(* 0.478866 *)

Please visit the official Wolfram Language Reference for more details.