On Tue, Jan 27, 2009 at 12:45 AM, alia hamieh <[email protected]> wrote: > I'm trying to deal with following problem: > > G=DirichletGroup(75) > chi = list(G)[8] > I need to compute with expressions such as: chi(2)*sqrt(11) > the problem is that we cannot do this multiplication because we have > "incompatible" operands, the first belongs to the cyclotomic field of order > 20 and the other one belongs to a symbolic ring. > Is there a way to fix this problem? > > alia
You can do the following. It's awkward but it works: sage: G = DirichletGroup(75) sage: chi = list(G)[8] sage: K = G.base_ring() sage: R.<x> = PolynomialRing(K) sage: L.<alpha> = K.extension(x^2 - 11) sage: chi(2) * alpha zeta20^4*alpha Here alpha = sqrt(11). Someday Robert Bradshaw is likely to make your original chi(2)*sqrt(11) work. We'll see. William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] 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 -~----------~----~----~----~------~----~------~--~---
