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Elliptic curve definition in Jacobi intersection form.
§Equation
$$ s^2 + c^2 = 1, \quad a s^2 + d^2 = 1 $$
over a field $F$ with $\mathrm{char}(F) \ne 2$.
The EFD records that this model is birationally equivalent to the Weierstrass curve
y² = x³ + (2-a)x² + (1-a)x.Structs§
- Jacobi
Intersection Curve - A Jacobi-intersection curve.