An invariant of an Elliptic Curve given in the form which is closely related to the
Discriminant and defined by
See also Discriminant (Elliptic Curve), Elliptic Curve, Frey Curve
References
Berwick, W. E. H. ``Modular Invariants Expressible in Terms of Quadratic and Cubic Irrationalities.''
Proc. London Math. Soc. 28, 53-69, 1928.
Dorman, D. R. ``Special Values of the Elliptic Modular Function and Factorization Formulae.''
J. reine angew. Math. 383, 207-220, 1988.
Greenhill, A. G. ``Table of Complex Multiplication Moduli.'' Proc. London Math. Soc. 21, 403-422, 1891.
Gross, B. H. and Zaiger, D. B. ``On Singular Moduli.'' J. reine angew. Math. 355, 191-220, 1985.
Watson, G. N. ``Ramanujans Vermutung über Zerfällungsanzahlen.'' J. reine angew. Math. 179, 97-128, 1938.
Weber, H. Lehrbuch der Algebra, Vols. I-II. New York: Chelsea, 1979.