#13005: "maximum recursion depth exceeded" when doing change_ring(RR) on an
elliptic curve
-------------------------------+--------------------------------------------
Reporter: was | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone: sage-5.1
Component: elliptic curves | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
-------------------------------+--------------------------------------------
Behold this bug:
{{{
K.<a> = NumberField(x^2-5)
EllipticCurve(K,[1..5]).change_ring(RR)
}}}
BOOM!
{{{
...
File "coerce_maps.pyx", line 82, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3345)
File "coerce_maps.pyx", line 77, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3248)
File "/Users/wstein/sage/build/sage-5.0/local/lib/python2.7/site-
packages/sage/rings/complex_field.py", line 286, in _element_constructor_
if not isinstance(x, (real_mpfr.RealNumber, tuple)):
RuntimeError: maximum recursion depth exceeded while calling a Python
object
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13005>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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