Really sorry, I didn't give details. It was a 64 bit Mac running sage
version 4.5.2. But now I am running 4.5.3 and it seems to be working
fine.
Gagan
On Oct 20, 6:02 pm, William Stein <wst...@gmail.com> wrote:
> 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 Washingtonhttp://wstein.org
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