It is periodic in with minimal period . It is related to the Jacobi zn function by . In the literature (e.g. Whittaker and Watson (1927)), sometimes means Wikipedia's . Some authors (e.g. King (1924)) use for both Wikipedia's and .
It is periodic in with minimal period . It is related to the Jacobi zn function by . In the literature (e.g. Whittaker and Watson (1927)), sometimes means Wikipedia's  Some authors (e.g. King (1924)) use for both Wikipedia's and .