On Sep 24, 4:15 am, Raouf <[EMAIL PROTECTED]> wrote:
> 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.
Looks like a bug to me. The usual trick (at least in my book of using
n() does also not work):
[EMAIL PROTECTED]:/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1$ ./
sage
----------------------------------------------------------------------
| SAGE Version 3.1.3.alpha1, Release Date: 2008-09-24 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: G = DirichletGroup(21)
sage: chi = G.1;
sage: chi(23)
zeta6 - 1
sage: B=13*chi(23)
sage: print float(B)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/<ipython console> in
<module>()
TypeError: float() argument must be a string or a number
sage: type(B)
<type
'sage.rings.number_field.number_field_element_quadratic.NumberFieldElement_quadratic'>
sage: n(B)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/<ipython console> in
<module>()
/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/python/
site-packages/sage/misc/functional.py in numerical_approx(x, prec,
digits)
716 return
sage.rings.real_mpfr.RealField_constructor(prec)(x)
717 except TypeError:
--> 718 return sage.rings.complex_field.ComplexField(prec)
(x)
719
720 n = numerical_approx
/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/python2.5/
site-packages/sage/rings/complex_field.py in __call__(self, x, im)
212 except AttributeError:
213 pass
--> 214 return complex_number.ComplexNumber(self, x, im)
215
216 def _coerce_impl(self, x):
/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/complex_number.pyx
in sage.rings.complex_number.ComplexNumber.__init__ (sage/rings/
complex_number.c:2519)()
TypeError: unable to coerce to a ComplexNumber
sage:
Can someone more knowledgeable in the area open a ticket?
Cheers,
Michael
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