On Sun, Oct 17, 2010 at 5:50 PM, gagan <gagan.mathn...@gmail.com> wrote:
> sage: E=EllipticCurve('11a1');
> sage: E.modular_degree();
> /Applications/sage/local/bin/sympow: line 3: 9922 Segmentation
> fault ./sympow $*
EXACTLY what binary are you running, and on exactly which computer?
Do you have this problem if you build from source?
William
>
> ---------------------------------------------------------------------------
> 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
>
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--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org
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