Elliptic Divisibility Sequence - Nonsingular EDS

Nonsingular EDS

The discriminant of a normalized EDS is the quantity

\Delta = W_4W_2^{15} - W_3^3W_2^{12} + 3W_4^2W_2^{10} - 20W_4W_3^3W_2^7 + 3W_4^3W_2^5 + 16W_3^6W_2^4 + 8W_4^2W_3^3W_2^2 + W_4^4.

An EDS is nonsingular if its discriminant is nonzero.

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