#11095: Add BMSS algorithm for isogenies of elliptic curves
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Reporter: defeo | Owner: cremona
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-6.4
Component: elliptic curves | Resolution:
Keywords: isogenies ecc2011 | Merged in:
Authors: Luca De Feo | Reviewers: John Cremona, Marco
Report Upstream: N/A | Streng
Branch: | Work issues: merge conflicts
public/ticket/11095 | Commit:
Dependencies: | d88217455f757053cd032671ccfb3688fea5dc31
| Stopgaps:
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Comment (by pbruin):
For this part of the last commit
{{{
#!diff
--- a/src/sage/schemes/elliptic_curves/ell_curve_isogeny.py
+++ b/src/sage/schemes/elliptic_curves/ell_curve_isogeny.py
@@ -3441,13 +3436,14 @@ class EllipticCurveIsogeny(Morphism):
aut = [a for a in auts if a.u == sc]
if len(aut) != 1:
raise ValueError("There is a bug in dual().")
+ # PROBLEM HERE BELOW IN THE CODE : E0 not defined !
phi_hat.set_post_isomorphism(WeierstrassIsomorphism(E0,aut[0],E0))
self.__dual = phi_hat
}}}
see #17293, where I also noticed this problem; the correct line is
{{{
phi_hat.set_post_isomorphism(aut[0])
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/11095#comment:45>
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