#3416: Weierstrass form and Jacobian for cubics and certain other genus-one
curves
-------------------------------------+-------------------------------------
Reporter: moretti | Owner: was
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.12
Component: elliptic curves | Resolution:
Keywords: nagell, | Merged in:
weierstrass, cubic, elliptic | Reviewers: John Cremona, Marco
curves, editor_wstein | Streng, Nils Bruin
Authors: Niels Duif, | Work issues:
Volker Braun | Commit:
Report Upstream: N/A | Stopgaps:
Branch: |
Dependencies: #12553, #13084, |
#13458 |
-------------------------------------+-------------------------------------
Comment (by cremona):
Am I doing something stupid here? I have 5.11.rc0 with the patches from
#13458 and this ticket applied. Now
{{{
sage: R.<x,y,z> = QQ[]
sage: f = x^3+y^3+60*z^3
sage: from sage.schemes.elliptic_curves.jacobian import
Jacobian_magma_equation
sage: E = Jacobian_magma_equation(f)
(...)
NameError: global name 'SR' is not defined
}}}
despite
{{{
sage: SR
Symbolic Ring
}}}
The relevant line works fine by itself:
{{{
sage: cmd = "P<%s,%s,%s> :=
ProjectivePlane(RationalField());"%SR(f).variables()
sage: cmd
'P<x,y,z> := ProjectivePlane(RationalField());'
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/3416#comment:85>
Sage <http://www.sagemath.org>
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