This works:
sage: emb = B.parent().complex_embeddings()[0] sage: emb(B) -6.5 + 11.2583302492*I B is an element of a number field: sage: B.parent() Cyclotomic Field of order 6 and degree 2 and number fields have several embeddings into CC (in this case, 2): sage: len( B.parent().complex_embeddings()) 2 You have complete control over precision: sage: emb = B.parent().complex_embeddings(prec=200)[0] sage: emb(B) -6.5000000000000000000000000000000000000000000000000000000000 + 11.258330249197702407928401219788170385128234149767474082363*I John Cremona 2008/9/24 Raouf <[EMAIL PROTECTED]>: > > Hi, > I want to have a numerical value of a Dirichlet character : > > I have this line code in my notebook: > > sage: > G = DirichletGroup(21) > chi = G.1; > chi(23) > > evaluate: > zeta6 - 1 > > And when i want to use this value: zeta6 - 1 i have the error message: > > G = DirichletGroup(21) > chi = G.1; > chi(23) > B=13*chi(23) > print float(B) > > error message: > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "/home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ > 6.py", line 10, in <module> > print float(B) > File "/home/server2/sage/local/lib/python2.5/site-packages/ > SQLAlchemy-0.4.6-py2.5.egg/", line 1, in <module> > > TypeError: float() argument must be a string or a number. > > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
