On Sep 29, 2008, at 8:50 AM, David Møller Hansen wrote:
> > Let F2=GF(2^7,'a'), E=EllipticCurve(F1,[0,0,1,1,1]), > P=E.random_point(), F2=GF((2^7)^4,'a') > > Purpose: I want to look at the point P in the curve over F2 instead of > F1. So I some way I want to extend F1. > > My question is how do I, when I already have an extension field F1, > extend it to F2 in a way s.t. I can reuse element from F1 in F2? Does this do what you want? sage: F1.<a> = GF(2^7) sage: f=x^2+x+F1(1) sage: F2=F1.extension(f,'u') sage: F2 Univariate Quotient Polynomial Ring in u over Finite Field in a of size 2^7 with modulus u^2 + u + 1 sage: a in F2 True HTH Justin -- Justin C. Walker, Curmudgeon-At-Large, Director Institute for the Enhancement of the Director's Income -------- The path of least resistance: it's not just for electricity any more. -------- --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
