Weierstrass elliptic
From specialfunctionswiki
The Weierstrass elliptic function is $$\wp(z;\omega_1,\omega_2)=\dfrac{1}{z^2} + \displaystyle\sum_{n^2+m^2 \neq 0} \left\{ \dfrac{1}{(z+m\omega_1+n\omega_2)^2} - \dfrac{1}{(m\omega_1+n\omega_2)^2} \right\}.$$
