#128: possible clash for EllipticCurve(j-invariant) signature
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Reporter: nbruin | Owner: was
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-4.3.3
Component: elliptic curves | Keywords:
Author: John Cremona | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by nbruin):
Cremona may be agreeing with me but I don't think I agree with him. The
other example
{{{
sage: R.<x> = QQ[]
sage: EllipticCurve( x^3+1 )
Elliptic Curve defined by y^2 = x^3 + 1 over Rational Field
}}}
makes perfect sense to me and the present patch does fix that too. It
matters whether a univariate or a bivariate polynomial gets put in.
Perhaps this should go on another ticket, but a good start is here already
and we'll never get such a nice ticket number (8192 is already gone).
It is nice to recognise when a bivariate polynomial obviously defines a
weierstrass normal form, but then you may as well just look at general
cubics with a rational flex.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/128#comment:16>
Sage <http://www.sagemath.org>
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