On 10/17/2010 07:50 PM, gagan wrote:
> sage: E=EllipticCurve('11a1');
> sage: E.modular_degree();
> /Applications/sage/local/bin/sympow: line 3: 9922 Segmentation
> fault ./sympow $*
>
> ---------------------------------------------------------------------------
> RuntimeError Traceback (most recent call
> last)
>
> /Hercules/MacUsers/graduate/sekhon/<ipython console> in <module>()
>
> /Applications/sage/local/lib/python2.6/site-packages/sage/schemes/
> elliptic_curves/ell_rational_field.pyc in modular_degree(self,
> algorithm)
> 3194 if algorithm == 'sympow':
> 3195 from sage.lfunctions.all import sympow
> -> 3196 m = sympow.modular_degree(self)
> 3197 elif algorithm == 'magma':
> 3198 from sage.interfaces.all import magma
>
> /Applications/sage/local/lib/python2.6/site-packages/sage/lfunctions/
> sympow.pyc in modular_degree(self, E)
> 227 if i == -1:
> 228 print self._fix_err(v)
> --> 229 raise RuntimeError, "failed to compute modular
> degree"
> 230 return sage.rings.all.Integer(v[i+len(s):])
> 231
>
> RuntimeError: failed to compute modular degree
Can anyone reproduce this? I get
sage: E=EllipticCurve('11a1'); E.modular_degree()
1
on 64-bit Ubuntu 8.04.4 LTS (i.e., sage.math.washington.edu) with 4.5.2,
4.5.3, and 4.6.alpha3. I get the same output with 4.5.{1,2,3} and
4.6.alpha3 on OS X 10.6 (bsd.math, 32-bit build).
Gagan, can you tell us more about your installation and system? Did you
install a pre-compiled binary, and if so, which one, or compile from
scratch? What are your hardware specs and OS version? If you compiled
from scratch, what happens if you reinstall the SYMPOW package with
cd SAGE_ROOT
./sage -f spkg/standard/sympow-1.018.1.p7.spkg
and rerun the example?
--
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
URL: http://www.sagemath.org
