Bill Allombert on Sun, 22 Jan 2017 21:18:01 +0100 |
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Re: Question on elliptic curve group orders... |
On Sun, Jan 22, 2017 at 02:03:29PM -0600, wraithx@morpheus.net wrote: > Hello all, > > I have some code that should work in Sage, but I don't have that installed. > I do have pari/gp installed. Can someone help me convert the following code > so that I can run it in pari/gp? FindGroupOrder(p,s)= { K = Mod(1,p); v = K*(4*s); u = K*(s^2-5); x = u^3; b = 4*x*v; a = (v-u)^3*(3*u+v); A = a/b-2; x = x/v^3; b = x^3 + A*x^2 + x; E = ellinit([0,b*A,0,b^2,0],K); factor(ellcard(E)) } the others are similar except for x,y = P.xy() which is [x,y] = P; Cheers, Bill.