Ariel Pacetti on Sat, 22 Oct 2005 06:06:45 +0200

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Supersingular Elliptic Curves

Is there a routine in GP to compute the Hasse invariant of an elliptic curve in F_p? I tried to compute the number of points of order p, or the j-invariant, but didn't succed. (y^2+y = x^3 should answer 0 for p=2).