pub const EIGHT_TORSION: [EdwardsPoint; 8];Available on
curve25519_dalek_bits="64" only.Expand description
The 8-torsion subgroup \(\mathcal E [8]\).
In the case of Curve25519, it is cyclic; the \(i\)-th element of the array is \([i]P\), where \(P\) is a point of order \(8\) generating \(\mathcal E[8]\).
Thus \(\mathcal E[4]\) is the points indexed by 0,2,4,6, and
\(\mathcal E[2]\) is the points indexed by 0,4.