The case of the Weierstraß Elliptic Function with invariants and .
See also Lemniscate Case, Pseudolemniscate Case
References
Abramowitz, M. and Stegun, C. A. (Eds.). ``Equianharmonic Case (, ).'' §18.13 in
Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, p. 652, 1972.